Mission: Shark/Red Snapper Bottom Longline Survey, Leg 1
Geographic Area of Cruise: Western North Atlantic Ocean
Date: August 8, 2026
Latitude: 31° 36.130’ N
Longitude: 79° 40.546’ W
Weather Data from the Bridge: South to southeast winds, 5 to 10 knots. Seas 4 to 5 feet. Showers likely and scattered thunderstorms.
Science and Technology Log
NOAA Operations Officer Heather Gaughan and science volunteers Maysin Douglas and Kleys Morillo measure the length and weight of an Atlantic sharpnose shark (Rhizoprionodon terraenovae)
In the past couple days, we have begun to catch a greater number of small sharks that do not require the cradle. When a smaller shark is hauled up, length measurements are taken on a board that’s like a big ruler. They can be weighed by hanging them from a handheld scale. During this process, I was able to hold a juvenile tiger shark!
How do you hold a shark safely? Sharks are similar to alligators in that they have very strong muscles for biting down but weak muscles for opening their mouths. If you hold them firmly in the right spot, it is possible to keep their jaws clamped shut. In the cradle, the person controlling the shark’s head applies downward pressure to keep the jaws closed. On the deck, grasping with thumbs and fingers on either side of the jaw does the trick.
I was assisting with measuring when suddenly everyone around me insisted that I hold the shark. I am not going to lie: I was terrified to hold that shark! But everyone here is very encouraging and they want to make sure I don’t leave anything on the table. After all, I came out here for a challenge. So I took the shark that was handed to me and now I can live without regret. I sent this picture to a student’s mother to show him and he said, “Aww, that’s my teacher, she’s a shark catcher!” New teaching level unlocked.
Because this leg of the survey spans the end of July and the beginning of August, we have had to participate in abandon ship drills twice. During these drills, we practice getting to our muster stations for fire, mariner overboard, and abandon ship emergencies. For the abandon ship drill, we have to practice putting on our survival suits. These all-in-one suits are designed to keep you afloat and prevent hypothermia while awaiting rescue. They are also equipped with whistles and lights so that you can alert other ships to your location. My suit was comically large, but I was assured that it would still keep me warm and afloat should I need it.
You might wonder why we would need protection from hypothermia in the summer when the water is around 80° F. Water conducts heat better than air. This is why you can briefly stick your hand into a 400° oven without injury but 212° water will burn you instantly. Being immersed in water below your body temperature will sap your body heat much faster than air at the same temperature would and your body can’t keep up with maintaining warmth. You can become hypothermic in 80° water within a couple of hours. When you are far from shore, it could take much longer than that for another vessel to know you’re in trouble, locate you, and arrive to rescue you.
Although being aboard ship — or out on a recreational boat — can be a lot of fun, safety should always be first in everyone’s mind. If you’re planning to get on the water, please make sure you’re ready for emergencies and have all required safety equipment. Boating laws vary by state but this site from the US Coast Guard is a great place to start learning: https://www.uscgboating.org/recreational-boaters/
Cheyanne Vanderdonckt wearing a survival suit during a safety drill (Photo credit: Maya Seehotlz)
While the deck crew and science team work in the well deck hauling in the line, the officer driving the ship is just as busy up on the bridge. NOAA vessels are under the command of officers from the NOAA Corps, which is a uniformed service branch. Oregon II’s commanding officer (CO) is Commander Jesse Milton and he was kind enough to give me a tour of the bridge during haulback operations one evening. It is the quietest place on the ship and it has a wonderful mix of 1960s era control panels and new technology. After dark it is illuminated only with red lights to preserve night vision. Even with modern radar and sonar systems, the most important safety feature is the vigilance of the person at the helm.
In the picture below you can see Operations Officer Heather Gaughan looking out the starboard window to maneuver the boat from the controls there. There is a similar setup on the port side, as well as the primary controls in the center. Being able to operate the vessel from these different vantage points assists with operations such as docking and hauling in the fishing lines. After the fishing line is set, the line is cut so it is no longer attached to the ship. This means the ship must go back and pick it up again. The ship must approach the high flyer close enough for crew members to be able to catch the line attached to it with a grappling hook, but not so close that it runs over the line. Then the ship must change its angle of approach so that the line is more or less parallel to the side of the ship. These are delicate maneuvers that require coordination and communication between the bridge and the crew hauling in the line.
In the bridge, Operations Officer Heather Gaughan drives the ship while looking out the window to starboard while Commanding Officer Jesse Milton looks out the front.
As part of my Teacher at Sea experience, I was invited to deploy two drifting buoys as part of NOAA’s Adopt-a Drifter Program. This program helps connect students to ocean science as they track the movements and data from their drifters.
The drifter itself consists of a spherical float — like a large, rigid beach ball — attached by a tether to a drogue. The drogue looks kind of like a large windsock or a fabric play tunnel. It helps to anchor the buoy in the upper surface of the water, rather than allowing it to be tossed around in the wind and the waves. Students can track the drifter buoy as it moves along in ocean currents and gathers data on sea surface temperature. Other data gathered can include barometric pressure, wind speed/direction, and salinity.
The data from drifters can be used to support weather forecasting, as well as climate research. All of these drifters are part of the Global Drifter Program, which aims to maintain an array of these mobile data transmitters around the globe. You can see all the drifters on a map and click on each one to learn more about it here: https://www.aoml.noaa.gov/global-drifter-program/
Before deploying the first drifter, we decorated it with stickers and messages for my students. We chose a spot within the Gulfstream current to give the drifter buoy a good chance of traveling far. The batteries typically last about 400 days but they have been known to last much longer. Before we tossed it off the stern, the bridge made an announcement for anyone who wanted to come watch. It felt like a little celebration.
Our decorated drifting buoy ready to be deployed, deployment with lead fisherman Sean Gronquist, and a view of the buoy drifting away. (Photo credits: Cheyanne Vanderdonckt and Maysin Douglas)
Aboard ship, we are beginning to ask one another what we miss from land. We miss our pets and going barefoot (not allowed for safety reasons on the ship). I miss my husband and taking naps on the couch with my dog. It’s also a little frustrating to see all this water and not be allowed to swim!
I am still enjoying being at sea, but I miss working within my realm of expertise. At my workplace, I am an experienced employee that people may come to for help with challenging student behaviors or ideas for teaching a tricky concept. Here I am helpful with routine tasks, but way over my head in scientific conversations. This is also really helpful for understanding the emotional dimensions of learning. When students are struggling, they need support but they do not need us to remove all of the discomfort. This is often our first instinct as we teachers tend to be compassionate people, but being able to tolerate some level of discomfort is critical to learning. Supporting students through this — rather than seeking to eliminate all friction — is how we can help them to become lifelong learners. Instead we can remind them that making mistakes and temporary confusion are normal parts of the learning process. You can invite students to think about skills they have now that used to be difficult or impossible for them and think about how they improved. Sometimes all we need is a reminder that we have done hard things before and we can do them again.
While learning more about sharks, I have also been learning how scientists and the ship’s crew manage to write reports and e-mails in an office swinging from side to side at an inconstant rate. For the last few days the ship has been rocking quite a bit due to swell from a storm off the coast of Florida. This has made it challenging to read or write. Large objects on the ship are secured to keep them and us safe, but not everything can be strapped down so there are still some things falling off shelves. We will go on deck for a set or haul and return to find computers or other equipment on the floor. Everyone takes it in stride as part of life at sea. When I applied for the Teacher at Sea program, the application stressed three qualities above all: flexibility, fortitude, and the ability to follow orders. I can see these traits in the people working aboard Oregon II and I’m thinking of ways I can help to cultivate them in myself and my students.
Did You Know?
A chronometer is a highly accurate clock that can keep time under extreme conditions, such as those encountered at sea. Accurate timekeeping was difficult at sea when clocks relied on mechanical components whose movement was affected by the constant motion on the water. Being able to keep time accurately was important for navigation, particularly for calculating longitude. The marine chronometer was invented in the 18th century and began a new era for navigation.
During my tour of the bridge, Commander Milton told me I should get an engineer to take me down to the engine room to see Oregon II’s chronometer. It was originally part of the ship’s predecessor Oregon and is 100 years old. NOAA has educational activities to learn more about geography and navigation at https://nauticalcharts.noaa.gov/learn/educational-activities.html
Oregon II’s chronometer, originally part of its predecessor Oregon’s equipment
Mission: Shark/Red Snapper Bottom Longline Survey, Leg 1
Geographic Area of Cruise: Western North Atlantic Ocean
Date: August 4, 2026
Latitude: 34° 20.659’ N
Longitude: 76° 35.444’ W
Weather Data from the Bridge: Southwest winds 5 to 10 knots becoming 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Showers with a chance of thunderstorms in the morning, then a slight change of showers and thunderstorms in the afternoon.
Science and Technology Log
The survey is in full swing. Every day during our 12-hour shift we will arrive at 2-3 stations, and the night shift will do the same. The exact number depends on how far apart the day’s stations are, as well as weather conditions and how long haulbacks take. We work in the rain, but not if there is lightning. The distance between stations varies from about 10 to 50 nautical miles. (A nautical mile is approximately 1.15 miles on land.) Our exact speed varies with current and wind, but we generally travel at about 11 knots, which means 11 nautical miles per hour. We begin to bait the hooks for the next station about 15-20 minutes before we arrive. Then it takes about 20 minutes to deploy the line off the ship’s stern. As soon as we are done with that, a few members of the science team will go to the bow with the deck crew to deploy a device that collects data about the water column (more on that below). An hour after the line was set, we will begin to haul in the line.
What are we hauling in? In this part of the Atlantic Ocean, we are mostly catching sandbar sharks (Carcharhinus plumbeus). Other species include tiger sharks (Galeocerdo cuvier), nurse sharks (Ginglymostoma cirratum), and Atlantic sharpnose sharks (Rhizoprionodon terraenovae). As explained in my previous post, most sharks are hauled up using the cradle. In the cradle, length measurements are taken.
Why more than one measurement? Before this trip, I always heard about, say, a “six foot shark.” I knew that scientists use the metric system so we wouldn’t be measuring in feet and inches, but we are also taking 3-4 length measurements for each fish. These measurements have been standardized using parts of the shark’s anatomy as endpoints. This allows scientists to make comparisons across different specimens and field studies, but it also helps them check for accuracy. It can be challenging to get accurate measurements on a living, moving shark. In addition, some species do not have a fork in the tail or a pre-caudal pit. The measurements generally taken are the pre-caudal length (from the tip of the snout to the point where the caudal fin meets the body), the fork length (from the snout to the fork in the tail), and the total length. You can see these lengths on this helpful diagram from the Florida Museum of Natural History. As a scientist takes the measurements, a recorder stands by with a data sheet to write them down.
A diagram showing how to take different length measurements of a shark (Image credit: Florida Museum of Natural History)
When we catch a small shark, we can measure and weigh it on the deck. However, there isn’t a practical or safe method for weighing a large shark in Oregon II’s cradle. Instead, weights can be estimated based on length. If you are interested in how much a shark of a specific length might weigh, you can use this handy calculator from NOAA: https://apps-nefsc.fisheries.noaa.gov/shark/ This could be a great activity for having a little fun with measurement for students! After using good measurement practices to get your height, type your height in inches or centimeters into the calculator to see how much you would weigh if you were a shark. (If I were a sandbar shark, I would weigh about 95 pounds.)
The most exciting part of a shark catch is getting to tag the shark. Shark tagging helps scientists study shark behavior, populations and migration. If somebody catches a tagged shark, they can provide updated information on its location using a phone call or a website with a form. The tags we are using look like a piece of yellow coated electrical wire rather than a big plastic tag. They are inserted into the body right alongside the shark’s dorsal fin. After making a short (less than an inch) incision in the skin, the tagger inserts the tip of the tag with a device that resembles a large metal hypodermic needle. It’s important for everyone to work carefully but quickly to reduce stress on the animal and the chances of anyone being injured. After tagging, the hook is cut from the shark’s mouth and it is lowered back down to the water to be released. I have been allowed to tag three sandbar sharks so far and it is awe-inspiring to be so close to these amazing creatures.
Cheyanne Vanderdonckt (in yellow hardhat) tags a sandbar shark in the cradle while science party chief William Driggers and lead fisherman Sean Gronquist control the head and tail (Photo credit: Masyn Douglas)
This is the first leg (of four) of the Shark/Red Snapper Bottom Longline Survey. On this leg, we are fishing off the east coast of Florida, Georgia, South Carolina, and North Carolina. On the next legs, they will be in the Gulf and will likely catch much more red snapper. Red snapper has been fished commercially in the Gulf since the 1840’s and by the 1920’s there were already signs of overfishing that led to regulation. Today, it is considered a sustainable seafood choice because it is responsibly managed in the United States. The annual survey conducted by NOAA Fisheries helps inform the process of establishing catch limits.
Survey technician Gretchen Arndt measures the length of a red snapper (Lutjanus campechanus)
When a red snapper is caught, length and weight measurements are taken. Then the otoliths (ear stones) are retrieved. Otoliths are structures made of calcium carbonate that help the fish with balance and determining their position in the water. Otoliths of different species develop new layers at different rates. Marine scientists use the layers of the otolith to determine the age of a fish — much like counting the rings of a tree’s trunk. The fish is also examined to determine its sex and other tissue samples may be taken.
Maritime Career Focus: Survey Technician
Senior Survey Technician Gretchen Arndt is responsible for the scientific survey equipment on Oregon II. She has a bachelor’s degree in biological sciences with a marine focus from Florida Atlantic University. She worked as a field biologist and a field operations manager in the Florida Everglades. Marine biology is a competitive field that attracts many talented individuals. Gretchen says that driving and maintaining airboats and other equipment in the field helped give her the technical experience that led to her being hired by NOAA.
One of the pieces of survey equipment that Gretchen is responsible for is known as the CTD (for conductivity, temperature and depth). CTDs come in various designs and they are integral to the science of oceanography. The CTD can be used to retrieve samples of water for further analysis, as well. This device is deployed off the bow deck after each line is set. Getting the CTD into and out of the water is a coordinated effort between the bridge, the science team, and the deck crew. Gretchen also equips Oregon II’s CTD with a light and camera so that the science team can visually evaluate the seabed.
Gretchen Arndt with the “CTD”
Personal Log
Another beautiful sunset, viewed from the stern deck.
I feel like I could just look at the sea and the sky all day and night. Fortunately, we do have transit time between stations so I am able to spend some time gazing. At first I just see blue everywhere, but the longer and closer I look, the more colors I can pick out. In the reading curriculum we use in my school district we have lessons in which students spend time silently observing a work of art. They aren’t allowed to speak for at least a minute because it’s important to let everyone form their own impressions before they hear others’ ideas. I will definitely share some of my sea and sky photos with my class to have them look for as many colors as they can see.
A view of the Atlantic Ocean from Oregon II. How many colors can you see?
Occasionally I see other ships on the horizon and sometimes I can make out some features on shore. When we passed by the Kennedy Space Center at Cape Canaveral, I could see the massive Vehicle Assembly Building. My favorite view, however, is when dolphins swim alongside the ship. Dolphins follow boats and ships for many reasons. They can ride the bow wave to conserve energy. As the ship moves through the water, it can also disorient smaller fish, making them easier to catch. It is very hard to catch the exact moment a dolphin leaps to the surface, but I took a video one night while a spotlight was being used to illuminate the water for hauling back the longline.
One thing I enjoy about being a teacher is that people often tell me what they were like as children at school. At least a couple of people working aboard Oregon II have told me tales of having trouble at school because they didn’t like to sit still or got bored easily. Like many teachers, I always loved school. But I know this is not the case for everyone. In education circles, we talk about the “hidden curriculum.” Success in school requires a set of skills and traits that have nothing to do with the academic content being taught and which can be really challenging for neurodivergent students, students with disabilities, and many others. But this does not mean they lack the intelligence or drive to learn. In fact, many of them have the type of insight and creativity that is needed to drive innovation. If schools can’t support them, we are all losing out on the unique gifts and talents they have to share. To that end, I am always trying to find ways to make learning hands-on and connected to the real world. Although there is time for quiet and reflection, most of the day should be active and even a little loud. I try to highlight ways that my students’ character traits and interests might lend themselves to different career paths. I’m getting so many ideas from watching people work aboard Oregon II.
In my opinion, one of the coolest jobs on board is that of Fisherman. Fishermen handle lines and operate equipment, including cranes (I’m jealous!), winches, and the anchor windlass. They work with the scientists during fishing operations and maintain the fishing equipment. On this survey we are using a longline, but the ship is also equipped with trawling nets. (In fact, the ship’s design is basically that of a fishing trawler). When a shark is in the cradle, fishermen operate the crane to haul it up, handle the lines on the cradle to help guide it into place, and help control the shark.
Fishermen, deck crew and science team members setting longlines and operating the crane used to haul sharks up to deck level.
Lead Fisherman Sean Gronquist shared one of his hobbies with us after we caught a red snapper. He paints one side of the fish with a biodegradable ink and stamps it onto canvas to make a print. This preserves the size and details of the fish, and makes a beautiful piece of art. The Japanese name for this art is gyotaku. In my classroom, I use arts integration a lot in science and math. Arts integration is a method in which a lesson addresses both academic content standards and fine arts standards. It has been shown to increase student engagement and improve retention of learning. It’s also great fun. I’m really excited to share this cool art form with my students. It has a physicality to it that makes it more interesting than a photograph. It will also be a great starting point to talk about texture. If you’re interested in educational uses for fish printing, here is an article from Smithsonian Museum of Natural History: https://ocean.si.edu/conservation/get-involved/educational-uses-gyotaku-or-fish-printing
Lead Fisherman Sean Gronquist demonstrates steps in the process of making prints from fish. After the initial printing, he will return to add details.
We have about a week to go in our survey and I am still enjoying every minute of my time on board. We had a couple of windy days that tested my sea legs, as well as my ability to sleep. Ships are very noisy in the first place, but the sounds increase as things start to slide around and doors knock around in their frames. Fortunately, I’ve got old hands to teach me tricks like stuffing bits of paper towel into drawers and doors to stop them from rattling. Nothing is as simple on a ship as it is on land, but that’s all part of the adventure.
Did You Know?
Although they are fish, many sharks give live birth. This means that some sharks have “belly buttons” that remain for a few months after birth. (If we come across a shark belly button I promise to share a picture!) Sharks also have two uteri. This year, one of my students was very excited to tell me that sand tiger shark embryos eat their siblings in utero and that checks out too. Although it may seem a little gruesome as a “fun fact,” it also helped us put things into perspective one day when he shared that he was in a bad mood because he had a fight with his sister. You never know when some scientific knowledge will come in handy!
Had a chance to ride the small boat, and really see the Oregon II
Ahoy from the Gulf!
This first paragraph was written in worse weather. Today the sun has come out and the calm waters are back. But previously, I was editing this blog as we floated around in storms in the Gulf. They finally dissipated and we had a chance to score stations with a snakefish, sandbar, and a tiger shark. Probably one of the higher-wave days on the Beaufort scale since we left the port of Miami. Today’s prediction from the bridge is west-southwest winds at 5–10 knots and wave heights of about 1 ft, with scattered showers. The Oregon II is rolling, and swaying to the beat of the Gulf.
What number do we fall on the Beaufort scale? Right now, we’re sitting at about a 2—depending on the moment. But it can change quickly.
Video from the galley. What’s our Beaufort Reading?
Beaufort Scale
Just like our environment speaks to us about what’s happening around us, the ship communicates with other seafarers. The Day Shapes on the Oregon II mean something. Different shapes, and combinations of shapes, signal the level of awareness and caution other vessels need to have when approaching.
Different shapes, and combinations of shapes, signal the level of awareness and caution other vessels need to have when approaching.
Shapes are tied to Foremast to communicate with other vesselsBall, Diamond, and Ball – Dayshapes to communicate to other vesselsEach Shape means something
Our Day Shapes mean we’re restricted in our ability to maneuver – especially when we are deploying the CTD (conductivity, temperature, and depth) instrument. Since late in the evening on August 13th, we’ve been laying long lines and conducting CTD’s in 12-hour watches, usually 3-4 sets per watch.
We are currently the white dot inside the white circle in the storm front.
So those shapes have been up for a while. Other than our current status, wading in the not so velvet Gulf, we’ve been consistently living those shapes.
I already blogged about how we fish using bottom longline gear—I’m going to dive a little deeper into why we do it, what happens after the fish are caught, and what happens after we release them.
I just want to preface this by saying: this is by far one of the most complicated topics I’ve ever tried to teach high school students. Part of my work out here is learning from the people who do this everyday, so I can simplify it and make a complex system of natural resource management engaging for my students—and make it make sense.
Everything I’m sharing below is based on my personal experience learning from the fisheries biologists aboard the Oregon II—whom I’ll introduce in another blog post—as well as digging through NOAA Fisheries and academic resources to add to my understanding. Some of those resources were created with input from the very fisheries biologists on this ship, using the science and data collected during surveys like the one I’m on.
Enjoy.
Fish Hauled – New additions are in red, since last blog post.
Often overlooked, forgotten, Oceans and waterways are a massive source of “wild food,” a popular recreational playground, spiritual engagement, an epic research zone, and home to endless stakeholders. What I find most captivating about our ocean—and the complicated relationship humans have with it—is that you can’t see what’s below the surface without incredible precision, science, and a bit of luck and/ or chance.
Oregon II Underway to next fishing station.
The vast ocean covers 70% of Earth, and it’s deeply intertwined with our food, culture, oxygen, weather and climate, the water cycle, and life itself—the mystical, the economical, the spiritual, the recreational, and the scientific—right down to our land. How we manage and use it is vital to us all.
There are endless trenches I could dive into, but I’ll do my best to keep a steady progression in these blogs, cater to the students who will likely be reading this once school starts, and hopefully inspire some of them to explore deeper depths. I know I will—both during this trip and when I return to Brooklyn.
What is a “stock,” and how is it assessed?
First and foremost, a “stock” refers to the population demographics of a species of marine life. Stock assessments are conducted to check abundance and respond accordingly if needed with management strategies.
These assessments are built on the ABCs of a stock: Abundance, Biology, and Catch.
How do you collect data for the ABCs of fisheries science?
There are two types of data collected to assess a stock: fishery-dependent and fishery-independent.
Fishery-independent
Fishery-dependent
Fishery-independent data are collected by biologists on at-sea surveys that keep sampling time, area and gear consistent to gather information on fish stock abundance, biology, and their ecosystem.
Fishery-dependent data are collected directly from recreational and commercial fisheries, and provides landings information (total numbers caught), bycatch (catch that is incidentally caught), and biological details about the fish.
I am currently on a Fishery-Independent survey.
This a sample of what the day will look like.
Where is Oregon II going?
Being on the open water can get you all spun around. Now add zig-zagging across the Gulf nonstop for 18 days, 24 hours a day—baiting, setting, hauling, and doing science in the blistering heat. It helps that we have charts all over the “dry lab” and around the ship to show us where we are and where we’re headed.
I’m currently on Leg 2 of the survey. This survey has four legs. A leg is a separate time at sea within the overall survey. On each leg, different stations are worked to meet the objectives. The survey runs down the Atlantic Coast from North Carolina to West Palm Beach, FL, then transits back around past the Florida Keys and into the Gulf to begin sampling again north of the Dry Tortugas. In the Gulf, data is collected at three different depth strata: the shallowest and closest to the coast (9–55 m), midway (55–183 m), and farther out on the continental shelf (183–366 m)—bouncing back and forth along the shelf as we move up the western coast of Florida.
On my leg, we fish at different stations throughout the eastern Gulf, moving between these depth strata. I wasn’t too far from the coast where some families live. These stations are selected at random, with some structure like the depth strata and geographic areas to help ensure adequate spatial coverage. .
Green Dots represent areas surveyed, and black squares represent MPAs (Marine Protected Areas)
What is collected and how is it collected?
Catch is identified, measured, weighed, sexed, and often a fin clip is taken. Not all sharks are tagged, but every single one is identified. This part is the hardest for me—accurate identification is critical for collecting data used to assess the stock.
Even though we’re sailing in the Gulf of America, we use meters and Celsius. Standardization across datasets—as well as consistency in methods and results—is essential in science. Accessibility and transferability of data are key for making accurate determinations and ensuring the longevity of the dataset. I often forget that the rest of the world uses the metric system!
There are lots of shark species that are easy to tell apart—and others, not so much. For example, there isn’t just one type of hammerhead.
Smoothhound Shark ID
I find it so impressive when the fisheries biologists can identify them and then explain the differences to people who aren’t trained in fisheries biology. Major and subtle differences exist, and it takes a trained eye to spot them. The more you see it, the more you can’t unsee it.
Basic Shark anatomy for reference. Credit Shark Trust.Basic fish anatomy for reference
To figure out the sex of sharks you look for claspers—males have them, females don’t. Males use their claspers during the reproductive process. And that’s the story of the birds and the fish.
Identification of sex
We weigh them using a scale, placed in the mouth.
Finally, we remove the hook and let them go. All of this has to be done quickly, and once all the data is collected, we gently return the shark to the water and watch it swim away.
Ready to releaseShark in the cradleTagging a shark in the cradle.
Larger sharks are brought up in a cradle on the side of the vessel.
I got to see up close and personal what a hammerhead looks like—and had the privilege of participating in the tagging of this incredible animal. I have to say, I always knew they were real—a sort of mystical sea creature I thought I could only dream of seeing. Well, they’re real, and just as beautiful as I imagined.
Bringing a shark up in the cradle is always an exhilarating experience—being so close to these animals while contributing to both commercial and conservation efforts.
Great Hammerhead we took samples and tagged and released. Swimming away after data collected
Processing fin clips
Genetic samples (fin clips) are taken to a lab back on shore, where Texas A&M geneticists catalog and store them for future use and species-specific research projects.
For other fish, we collect eye lenses, fin clips, and otoliths.
All of these methods—and the data collected—help inform the preservation, conservation, and management of these species for both commercial and recreational purposes.
Retrieving samples from Red Grouper
inside the eye lies a lenses
close up of red grouper eye lenses
Preserving eye lenses from red grouper
Sample of Fin Clip
Otolith is the ear bone from fish
Ear bone from fish can help age it
Close up of Otolith
Preserving Otoliths
Red Grouper; eye lenses, fin clip, and otolith.
But why is this collected?
A colleague and mentor from New York Harbor School—a Teacher at Sea alum on NOAA Ship Oscar Dyson years ago— told me he was confused about what I was doing; what is the research question he asked?
The research questions can change depending on the needs of a particular species and or direction of particular research bodies. This data is collected to help manage the stocks of shark species and red snapper. The fisheries data collected on the Oregon II is included in regional stock assessments. After the stock assessment team reviews all the available data for a given species, scientific models can be developed which can then contribute to federal stock management in the region.
This survey has been happening year after year—for more than 25 years.
So, what’s going on with sharks today?
The famous summer blockbuster based on the book the Peter Benchley, Jaws Novel, instilled fear among people about sharks and was a catalyst to increased fishing for sharks – specifically white sharks – contributing to overfishing. For two decades following the release, lack of knowledge and fear, led to effects on the shark fishery.
“Think we are gonna need a bigger boat?”
“Jaws spearheaded a “collective testosterone rush” among fishers in the East Coast of the United States, leading thousands to hunt sharks for sport, as George Burgess, former director of the Florida Program for Shark Research, told the BBCin 2015. In the years following the film’s release, the number of large sharks in the waters east of North America declined by about 50 percent. “
Sharks are fished for several reasons: sport, commercial products, food, and scientific research.
Over the course of this immersion with scientists aboard the Oregon II, I’ve grown to love these animals and feel far less fear around them. Now, does that mean I’m going to go swimming with sharks off Long Island or in NYC? Not without a trained biologist like the ones I’m working with on the Oregon II!
A long time fear of these apex predators, has been sort of a commercial enterprise. Go to any water park and you will see a shark necklace. I think I even swam with sharks at Disney World Blizzard Beach, now that I think about it, sort of a weird thing. Baby shark is all over the airwaves and streaming services. I think we underestimate how cultural influences affect our view of our environment and its inhabitants. Sometimes, culture seeps into our consciousness.
Sandbar shark swimming after being tagged.Sandbar swimming away
I’ve stayed humbled and fascinated by these animals every single day of this experience.
Keep in mind, I’m just talking about federally managed fish in federal waters. To further complicate the matter there are also, States and/ or international law involved too. Sharks are managed federally under the Highly Migratory Species (HMS) classification.
Fishing and other human activities have influenced the species started in these fisheries, and the data has helped show these shifts over time. Hence the complicated, but necessary interconnections of science, policy, conservation, economics and stewardship. What adds to more a complicated scenario, generally sharks (relative to say many bony fish) are longer lived, take longer to mature and reproduce fewer young so that overfishing can have larger deleterious effects on their populations.
U.S. Senators Ted Stevens (R-AK) and Warren Magnuson (D-WA), 1973. Credit: Ted Stevens Foundation
The primary law that manages fisheries is the Magnuson Stevenson Act. The main purpose of the act was to establish sustainable and economically viable U.S. fisheries. Major components to establish this directive are as follows; Preventing overfishing, Rebuilding overfished stocks, Increasing long-term economic and social benefits, Ensuring a safe and sustainable supply of seafood, Protecting habitat that fish need to spawn, breed, feed, and grow to maturity.
Science-Based Management Tools
Much of the management of sharks in the Gulf are in line with the Magnuson Stevenson Act. There are a variety of methods that contribute to managing a species.
Due to surveys such as the one I am sailing on, and a science-based management approach, some shark stocks have even experienced population growth including:
Atlantic sharpnose
Atlantic blacktip
Sandbar
Spiny dogfish
Tiger
White
However, there are some species that aren’t as positive a story and need protection. Below is a list of sharks that are Prohibited from being caught in the U.S Atlantic, the Gulf, and Caribbean. Moreover, there are tools to help mitigate harm to these animals if an unintended catch (bycatch) occurs.
Below is a list of Prohibited Sharks in U.S Atlantic, the Gulf, and Caribbean. Moreover, there are tools to help mitigate harm if bycatch occurs. Bycatch occurs when you catch something that wasn’t what you are targeting.
It’s important to note that regulations exist for both commercial and recreational fisheries. However, in all fisheries that harvest sharks, no fins can be harvested at sea. Animals must come intact (fins naturally attached) to shore then can be harvested along with the entire animal. Finning has been illegal in US waters since 1993, with further protection enacted in 2000 and 2010.
Over time, if stocks replenish, species can be removed from the “no-fish” list. Conversely, if stocks dwindle, actions will be taken. Data is critical for making these decisions. It’s common for people to think that “overfished” means extinct. There are actually different classifications for fish populations. There’s a difference between extinction and being threatened, based on definitions in the Endangered Species Act.
An important concept for fisheries management and stock assessment is maximum sustainable yield—the maximum catch a species can sustain over time. It’s the amount of fish that can be harvested from a source, which will allow adequate reproduction and replacement. This is why research is done like the stuff down on the Oregon II and other ships in the NOAA fisheries fleet, the data helps make that decision. Fishermen need fish to make money, folks want fish to eat, and the environment needs to have the fish. Complicated.
Although complicated, data driven management has been proved to support growth of some shark species. Check out the cool story of the white shark slowly making a comeback after years of overfishing:White Shark Recovery.
In addition look at the timeline of shark fisheries; fishing, science, conservation, and policy.
First insights into the movements of young-of-the-year white sharks (Carcharodon carcharias) in the western North Atlantic Ocean Scientific Reports ( 2018)
What’s even more delicate and fascinating, the white shark nursery is in waters not far from NYC. Several researchers are tracking white sharks and their nursery habitats and juvenile behavior. They tagged and tracked 8 sharks and tracked their movement. You can see from their data where they are most frequent; red being the highest concentration, and light blue being the least during the months of August to October. This really shows the interconnection between the Hudson canyon, Long Island and our coastal harbors of NYC. All happening under the nose of the big city. The sharks are making it to the Hudson Canyon, which is approximately over 100 miles from NYC and filled with biological diversity.
We started talking today about when we’ll head back to port, and honestly, it made me a little sad that this trip is almost over. I had one day where I got really homesick—started missing Clara and the cat. A quick FaceTime fixed that and reminded me to stay present. Lately, school emails have started coming in too, so I guess I finally get what people mean by the “dog days of summer.”
The past few days have been a mix. Some hauls were pretty boring, and the weather’s been rough. But I don’t mind rough seas—kind of makes me feel salty, like a real mariner. Plus, the clouds have been a blessing, giving us some relief from the heat. And then came the set that changed everything: we brought up a tiger shark and a big sandbar in the cradle. That got my energy back in a hurry.
Taking hook out of Tiger SharkCheck weight of a Tiger Shark
Even on slow days, there’s a silver lining—it gives you time to really talk to people. Lately, we’ve been making our own fun with games like “find the rubber sharks” and a ship-wide murder mystery. I’ve already been “killed” and found 3 out of 20 sharks. When I’m not blogging or doing science, we’re in the lab playing Overcooked or Mario Kart. I wish I could say I’m crushing it, but that’d be a lie—at least for now. Maybe my luck will turn around. Out here, you need fun built in. Otherwise, the downtime will drive you nuts.
I’ve been working on listening more. It’s been cool. Folks here are curious about the Teacher-at-Sea guy from Brooklyn, and I’m just as curious about people from Mississippi doing shark stuff. The deck crew and engineering crew seem to be from all over, its awesome how all these people are on this ship to participate in this work. Clara would be proud—I’ve been asking more questions than talking about myself.
We’ve been sharing music too, and jamming during sets/ hauls. These folks are definitely not Phish fans, so I’ve had to dig into my youth and other playlists. I got one Phish studio track played—just one. Our watch leader Kristin was taking requests, and when I said Five Years, she laughed and asked, “Is it five years long?” It’s been fun shaking up my musical listening. New Orleans came up in convo, I forgot the geography of the Gulf area to NOLA—and that I actually lived and taught there in a season of my life. I have found memories of the food and culture of this area, it’s nice to relate to folks that enjoy it more frequently. One of these days, I’ll be back. Moe. is playing Halloween, Clara—what do you think?
I’ve also started talking to folks outside my watch crew. Turns out, it’s a small world out here. Some of these people are just a few degrees away from me in the environmental education world. We even know some of the same people. A couple of us have been in the same place at the same time before and didn’t even know it. One guy almost went to Harbor School but chose another path—still ended up working on ships like he wanted. Wild how that happens. The more I think about it, the more I realize: there are a lot of people out there doing wild things, and somehow, you bump into each other.
This blog was tough to write. There are so many directions to go. But at its core, it’s simple: people do science, and policymakers use that science to make decisions—especially about natural resources. Moreover, fingers crossed . For me, these blogs and this whole experience are filling in gaps in my own learning. They’re helping me figure out how to teach this stuff to my Harbor students in a real, meaningful way. Honestly, every paragraph here could be a lesson. Some could even turn into a whole unit. Maybe even a year-long course. The gears are turning.
Who knew I’d get this into sharks? It’s crazy how much we know—and how much we don’t—at the same time. A teacher at school is always saying playing science vs. real science, I wonder what he classifies this as. This experience makes me feel special, it’s been nice to see all the comments and folks have been reaching out to see how it’s going. It’s a good feeling when people are interested in what you are doing. I am glad to be tagging along with the crew on this ship, and it’s nice to highlight what they do is important and special. Waiting on the students to be interested, maybe I will let them have the dog days of summer. I see some of my students doing things like this in their future.
Seabirds that don’t nest in the U.S. but are seen flying in the gulf and visiting Caribbean and Florida.
Natty Brown, with yellow-bill, white underneath its wings. This one is a juvenile, as it hasn’t developed its color yet.
I thought this was a frigatebird at first, they are very different. Especially, the wings on the Booby are smooth, where is the wings on the frigatebird are sharp and lines.
Did you know?
Once Built for Bureau of Commercial Fisheries
Prior to the National Oceanic and Atmospheric Administration (NOAA) there was the Bureau of Commercial Fisheries. The National Oceanic and Atmospheric Administration (NOAA) is part of the Department of Commerce and was created in 1970.
Early on the director of the National Oceanic and Atmospheric Administration (NOAA) had a contest of what the logo should be. Below are the candidates from 1970.
The candidates for NOAA
Dr. Robert White, NOAA’s first administrator, gave employees a choice. A year after they all were introduced, number one was chosen to show the interconnections between Earth, ocean, atmosphere, and ecosystems.
Dr. White stated: “A white, gull-like form links the atmosphere to the sea or Earth. The Earth and atmosphere and the interrelationships between the two are, of course, major concerns of NOAA. The line defining the top of the gull’s wings also resembles the trough of a foaming ocean wave against the blue sky. A creature of sea, land, and air, the gull adds an ecological touch to the Earth-sky motif.”
Curtis, T. H., Metzger, G., Fischer, C., et al. (2018). First insights into the movements of young-of-the-year white sharks (Carcharodon carcharias) in the western North Atlantic Ocean. Scientific Reports, 8(10794). https://doi.org/10.1038/s41598-018-29180-5
Geographic Area of Cruise: Gulf of Mexico/Atlantic Ocean
Date: August 4, 2023
Latitude: 33°47.753′ N
Longitude: 78°13.019 W
Air Temperature: 22.3 kph
Wind Speed: 26° Celsius
Science and Technology Log: Meeting the tiger shark
Let’s face it, sharks are cool! They are an apex predator of the ocean. They are hunters and capture our imagination. Like most people, sharks are fascinating creatures if you take the time to get to know them.
Sharks are an ancient group of fishes. They have been on Earth since before there were any trees. They are intelligent and can be are very curious creatures that want to investigate new objects. Some species have social structures and recognize each other, and form relationships that last over many years. Some sharks have been observed hunting in groups. Personality, or should I say “sharkonality,” wise, individuals have been observed to be more assertive or more timid. They have sensory organs called ampullae of Lorenzini that sense electricity to help them find prey.
Sharks are quite varied. Some sharks must keep moving to breathe, while others can sit on the sea floor for hours at a time. Some sharks lay eggs, while others have live pups.
A tiger shark in the sling ready to be released. Notice the tag by its dorsal fin.
So far we have caught sandbar, Atlantic sharpnose, tiger, scalloped hammerhead, and great hammerhead sharks. The Atlantic sharpnose, sandbar, and tiger sharks all belong to the family Carcharhinidae, or requiem sharks. They have a flattened but not wide snout. In many species teeth are similar because in the top row the teeth are triangular and serrated (like a saw) and in the bottom row they are narrow and smooth-edged. Their eyes have a nictitating membrane that functions like an eyelid, but they can see through it. Interestingly, reproduction varies within this family of sharks.
Markings on a tiger shark pup. (ba-by shark doo doo doo doo doo doo)
Tiger sharks are striking to see up close. Their markings on their skin gives them their name and makes them easy to identify, even for a novice. Young tiger shark markings tend more toward spots that can grow into bars or stripes as they age. The bars will fade as the shark grows older.
The teeth of a tiger shark are easily identifiable as they are curved with a notch in it. Unlike other sharks in the Carcharhinidae family, the bottom row of teeth has the same triangular, serrated teeth as the top row. They eat a variety of food including crabs, squid, bony fishes, turtles, rays and birds as well as many other animals even other sharks. They have also been known to eat boat cushions, tin cans and even license plates.
They are one of the larger sharks, often growing 11 – 14 feet long and up to 1400 pounds. In the United States, tiger sharks are found from Massachusetts to Florida and the Gulf of Mexico.
Tiger Sharks have live babies called pups. They are ovoviviparous, and young develop inside their body before giving birth to live young. It is common for them to bear between 35 and 55 pups but have been known to have as many as 104. Because they bear so many pups, and the gestation is between 15 to 18 months, it is believed that they reproduce every three years.
Depredation: When a shark takes your fish
Depredation is when a fish has been hooked by a fisherman and is then attacked and eaten or partly eaten by another marine animal. This is obviously a problem for the fisherman because the fishermen cannot use the fish. According to Dr. William Driggers, Chief Scientist on the Oregon II Longline Shark and Snapper survey, depredation is on the increase in U.S. waters because shark populations are increasing. Shark populations are increasing because of good management of the shark populations. The most likely shark species to take a hooked fish is the whatever shark species is most common in that area. In other words, no one species is the worst offender. We have witnessed this at least six times on this survey leg.
A sandbar shark takes a bite out of a red snapper.
Graduate student Caitlin Retzlaff shows the results of depredation.
Meet the Crew: Fisherman/Deckhand Josh Cooper
Josh is a professional fisherman aboard the Oregon II! Yup, one position on this crew is to be a professional fisherman.
The responsibilities of a fisherman are many. Everyone on the boat has very well defined duties and must be flexible and a good team member. He helps load the ship before it leaves the dock. He helps with docking by handling the lines. There are many duties once underway. There is painting and cleaning to be done, preparing gear and running the machinery used for fishing.
Then there is the fishing. Josh loves fishing. The fishermen are on board to help handle the big sharks and other large fish. Josh has done a lot of fishing. He sometimes operates the crane when the cradle is needed for a big shark. In emergency situations Josh is on the fire team and operates the small rescue boat that is aboard the Oregon II.
Josh running the crane to use the cradle.
Josh graduated from the University of Alabama, but a degree from a university is not required to be a fisherman/deckhand. After earning a dual major in biology and marine biology, he went to Alaska as a fisherman on commercial fishing vessels.
After that, he joined NOAA as a fisheries observer. In this job, he was on commercial fishing boats. He would be assigned to join a fishing boat, usually a small boat with two to three fishermen. It was his job to collect data on the fish caught. This would include species, length and weight. After doing this for two years in Alaska, he moved to do the same job in the Gulf of Mexico. Josh continued to do this work for six more years.
He first came to the Oregon II as a contractor working with Artificial Intelligence (AI) teaching the computers to recognize fish species. He was doing this when a position opened up as a part of the deck/fisherman crew. He has been on the Oregon II for two years. He likes that the accommodations are better than many of the other boats that he has lived on and he likes the people that he works with.
Being a fisherman is a big commitment. Josh says that he is out to sea about 140 days a year. When the ship is docked there are many maintenance tasks to be done.
Josh telling a fish story. He was not exaggerating, by much.
Personal Log: Schedules
NOAA Clock
Life on the Oregon II is dictated by schedules, until it’s not. My basic schedule is dictated by my shift. I am on the day shift, which means that I work from noon until midnight. The night shift is midnight until noon. We use a 24 hour time schedule to avoid any confusion about which 8:00 or 10:30 we are referring to. So I am working from 12:00 – 0:00. During that time we might set and haul as many as three stations, or as few as one, so far.
Many factors might impact this schedule, including transit time between stations, as well as weather. I usually wake up some time between 7:00 and 8:00. Breakfast closes at 8:00 and I do like breakfast. On those mornings that I do not make it to breakfast, there is always fruit, cereal, and a variety of leftovers available. The rest of the morning I can use to exercise, write, read and relax. I like to enjoy a few minutes up on the flying bridge watching the ocean or observing a haul below. Lunch begins at 11:00 and I like to get in there fairly early to be sure that I am ready for my shift at 12:00. Our shift simply takes over where the last one left off. Sometimes we are in transit, but we might take over with the set or haul. We continue for the rest of the shift with the station schedule until midnight. Dinner is scheduled from 17:00 – 18:00. If we are not able to make it to the galley due to working, they will hold a dinner for us.
The ship operates and holds to schedules 24-7 unless there is a problem with the weather or mechanical problems. It has taken a while, but I have adjusted to this schedule and it feels pretty normal. Currently, we are taking shelter near shore to wait out a storm. We are expecting a 24 hour delay with no fishing stations.
The Sturgeon Supermoon
One of the real treats is the natural beauty. The ocean is not just a repetitive body of water, but an everchanging montage of colors and shapes. Sometimes a light green, to deep blue at other times. At night, the blanket of black is broken by the white foam of the bow waves and whitecaps. There are dolphins, sea turtles, sea birds, not to mention all of the interesting creatures that come up on the longline. Sunsets never fail to disappoint, and then of course, the moonrises. We were lucky enough to be hauling in the longline when the Antares rocket was launched from Wallops Island, Virginia. We watched as the orange glow slowly receded into the clouds. Just a few minutes later, the Sturgeon Supermoon rose behind the clouds on the horizon. That was an incredible experience. There is always some new natural beauty to be found out here. Nature may be beautiful but it is not subject to our schedules.
Animals seen: spotted dolphins, laughing gulls, gag grouper, scamp grouper, oyster toadfish, bonita, great hammerhead, scalloped hammerhead, sucker fish
We had been watching these dolphins coming to the surface. This is the video we got when we retrieved the CTD.
Oyster toadfish, watch out for those venomous spines. Photo credit: John Brule
Did you know?
Have you ever had someone wish you “fair winds and following seas?” Josh explained this saying to me. While we were talking, the boat was rocking back and forth in 3-5 foot waves. Not a particularly smooth ride. He commented that, “It seems like we always find the trough.” I asked him what he meant. He explained that when waves are coming from one side or the other, this is said to be “in the trough.” The low point between waves is called the trough. The smoothest ride on a boat comes when the waves are coming from the stern, following the ship, so to speak. That would be the seas following the boat.
Geographic Area of Cruise: Atlantic Ocean, SE US continental shelf ranging from Cape Hatteras, NC (35°30’ N, 75°19’W) to St. Lucie Inlet, FL (27°00’N, 75°59’W)
Date: August 19, 2019
Tiger Shark! NOAA Ship Pisces Underwater Camera Action (video has no dialogue, only music)
This video is a collection of fish trap camera footage recorded during my NOAA Teacher at Sea adventure aboard NOAA Ship Pisces. Very special thanks to the NOAA science team: Zeb Schobernd – chief scientist and especially Mike Bollinger and Brad Teer – camera and gear experts.
