Photo of the Week

We are excited to bring back our Photo of the Week section so stay tuned for new content coming soon! In the meantime, take a look at these fantastic pictures from our teachers.

Sea Stars: A Scallop’s Worst Nightmare

January 27, 2020
Astropecten vs Sclerasterias (same family as Asterias, different genus): the smaller Astropecten target young scallops, while the Asterias/Sclerasterias target larger scallops.

Photo: Trevor Hance

Natural predators of scallops include various species of starfish, such as Astropecten and Asterias. These starfish use distinct predatory tools. The larger starfish, the Asterias, has a hydrologic musculature that allows it to essentially pull apart the shell of the scallop, inject digestive enzymes (aka – “putting its stomach inside the scallop”) and enjoy! The Astropecten is quite different because they completely engulf the scallop and digest it internally. The two types of starfish target different-aged scallops.
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