Invasion

Invasion Description

1st Record: mudflats off Redwood City/CA/South San Francisco Bay (1927, Grant and Cole 1931, cited by Carlton 1979; Cohen and Carlton 1995). There are no records in recent decades, so establishment is uncertain (Coan and Valentich-Scott, in Carlton 2007)

Geographic Extent

mudflats off Redwood City/CA/South San Francisco Bay (1927, Grant and Cole 1931, cited by Carlton 1979; Cohen and Carlton 1995); Oakland/CA/Lake Merritt (1932, dead shells, Carlton 1979); Coyote Point/CA/South San Francisco Bay (Coan 1997)