Florent's Guide To The

Hawaii Reefs

Blue-Black Urchin
Blue-Black Urchin
Scientific Name: Echinothrix diadema
Class: Echinoidea
Category: Sea Urchins
Size: 4 to 8 in. (10 to 20 cm)  
Depth: 3-30 ft. (1-10 m)
Distribution: Indo-Pacific, Hawaii


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© 2004-2016 Florent Charpin