Home > Invertebrates > Bivalves > Pinctada radiata

Updated 8/20/2025

Family Margaritidae

INDO-PACIFIC / HAWAII

Pinctada radiata

RAYED PEARL OYSTER

Uncommon in harbors and bays with freshwater input.  Margin not fringed.  Attains diameter of 4 inches, 100 mm.  This species is used for cultured pearls in Japan.  Indo-Pacific, introduced to Hawaii and the Mediterranean Sea.  Illegal to collect in Hawaii.