Home > Invertebrates > Bivalves > Parahyotissa numisma

Family Gryphaeidae

HAWAII

Parahyotissa numisma

Portlock, Oahu, 35 feet

COIN OYSTER

Common on the underside of ledges and rocks in shallow water.  Attains 2 inches.  Hawaii & the Indo-Pacific.  Ostrea thaanumi & Ostrea hanleyana are synonyms.