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Photographed by Chantel at a Bioblitz activity held during the Hawaii STEM ...
There's thousands of them. Its a serious plague in the Caribean Coral reef
Black-bodied sea urchin, 2-3 inches across, with thick, white-gray spines, on ...
A pencil slate urchin I guess. I'm not really sure. Sulpa Islet, Mactan, Cebu.
Rock-Boaring Urchins on the jetty at Pokai Bay, Oahu, Hawaii.
Black Rock-Boring Urchin on the reef outside the tide pools at Shark's Cove, ...
Sea urchin which was mainly black on its periphery but was red towards its ...
Also known as Burrowing Urchin, Pale Rock-boring Urchin, Reef Boring ...
Photo take at -30 ft on a coral reef under a flat rock, this small urchin ...