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HAWAII

Ophiocoma erinaceus

Night, Makapu'u tidepool, Oahu

 

Day

Night, Punalu'u, Oahu, 4 feet

 

 SPINY BRITTLE STAR

Abundant under rocks in shallow water.  Black during the day, displays gray blotches at night.  Attains overall diameter of 8 inches.  Hawaii & the Indo-Pacific.