Home > Invertebrates > Bivalves > Parahyotissa numisma

Updated 3/19/2014

Family Gryphaeidae

INDO-PACIFIC / 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.