Juvenile; ~8mm shell length. From a mud grab off Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 1/12/08. © Peter J. Bryant.

Japanese Littleneck Clam
(Manila Clam)

Venerupis philippinarum

An introduced species

Bivalvia: Veneridae

Thanks to Paul Valentich-Scott, Santa Barbara Museum of Natural History, for identification

Manila Clams: Rearing and Nursery methods

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Juvenile; ~8mm shell length. From a mud grab off Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 1/12/08. © Peter J. Bryant.
Juvenile; ~8mm shell length. From a mud grab off Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 1/12/08. © Peter J. Bryant.
Distribution in Newport Bay, Newport Beach, Orange County, CA. 2012: Large circles, adults >5/cu.ft.; Small circles, adults <5/cu.ft.; Large squares, juveniles >5/cu.ft.; Small squares, juveniles <5/cu.ft.