Asian date mussel

Musculista senhousia

Bivalvia: Mytilidae

~8mm shell length

From a mud grab off Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 2/9/08. © Peter J. Bryant.

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

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Distribution in Newport Bay, Newport Beach, Orange County, CA. 2012. Large circles, >5/cu.ft.; small circles, <5/cu.ft.: