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Green Sea Urchin discovered by Marcel Roy (#447)
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Observed: December 10, 2010 @ 1:00 PM
Posted on: December 29, 2010 @ 11:13 AM (diff: 19 days)
Green Sea Urchin
Green Sea Urchin: average size is 50-60 mm, but may reach a maximum size of about 85 mm.
Distribution: The green sea urchin is one of the most widely distributed of all Echinoderms. It has a circumpolar distribution, which extends into the Arctic regions of both the Atlantic and Pacific Oceans. It commonly inhabits the rocky subtidal zone from the low-tide mark down to a depth of 1200 m, but also occurs intertidally in tide pools.
Diet: The green sea urchin primarily grazes on seaweeds (kelp being its preferred food source), but will also consume a wide variety of organisms including mussels, sand dollars, barnacles, whelks, periwinkles, sponges, bryozoans, dead fish, and - when hungry enough - other sea urchins.
They are eaten by: A variety of predators including crabs, sea stars, wolf eels and humans. The Japanese relish the gonads called "uni",
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