Home > Invertebrates > Bivalves > Parahyotissa numisma

Updated 3/19/2014

Family Gryphaeidae

HAWAII

Parahyotissa numisma

Portlock, Oahu, 35 feet

 

Makapu'u, Oahu, 20 feet

 



Sand Island, Oahu, 10 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.