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Project Noah Nature School
Diadema genus
From spine tip to spine tip, this urchin was about 4." The spines are of two lengths -- the long ones more than an inch, the short ones a little more than a quarter inch. The short ones are venomous, and if they break off in you they'll cause a lot of pain.
This specimen washed up on the beach and was not alive, although in perfect condition. It was probably dislodged from the nearby reef by heavy surf.
Spotted on May 5, 2011
Submitted on Apr 5, 2016
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