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Black Diadema Sea Urchin (Diadema antillarum), Mu Ko Lanta Marine National Park, Thailand

Black Diadema Sea Urchin (Diadema antillarum), Mu Ko Lanta Marine National Park, Thailand

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Uploaded 10 Jan 2014 by Peter Prokosch
Year: 2014 Taken by: Peter Prokosch
The Black Sea Urchin is characterized by its exceptionally long black spines. It is an important herbivore on the coral reefs. When the population of these sea urchins is at a healthy level, they are the main grazers which prevent algae overgrowth of the reef.
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