Home > Invertebrates > Sea Urchins > Diadema setosum

Created 9/12/2022

Family Diadematidae

INDO-PACIFIC

Diadema setosum



Yawatano, Japan


Vava'u, Tonga, 4 feet
   

ORANGE-RING LONG-SPINE URCHIN

Common on reefs in calm or rough water.  Black with orange anal bulb, some blue lines on test, juveniles banded brown and white. Test attains 3 inches, spines 8 inches.  Thin venomous spines protected by thicker primary spines.  Red Sea to Japan and Marquesas Islands, excluding Hawaii.