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)

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)