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Project Noah Nature School
Diadema antillarum
Sea urchin in the shallow water of the Puerto Rican island Palominitos
Diadema urchins feed on algae and are therefore keystone species on Caribbean coral reefs. In the 80s a mass die-off of this sea urchin had devastating impacts, causing entire ecosystems to collapse. In other words, you've documented one of the most important species of Caribbean reefs :)
Spotted on Jun 13, 2011
Submitted on Jun 21, 2011
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