Diadema sp.
needle spined urchin
Diadema Sp. needle spined urchin

Family Diadematidae

The needle spined urchin, Diadema sp., is very common at Julian Rocks. Diadema has long, thin, black needle spines. They are often found in groups in under rocks and in crevices. Bottom-centre is the empty test (shell) of the needle spined urchin. Blue gropers are known to feed on these urchins.

Distribution =   widespread
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