Invasion

Invasion Description

1st Record: Alameda/CA/San Francisco Bay (1898, Carlton 1979; Cohen and Carlton 1995)

Geographic Extent

Contra Costa County/CA/San Pablo Bay (1931, CAS-IZ 126899.00, California Academy of Sciences 2013); Treasure Island, San Francisco/CA/San Francisco Bay (2002, CAS-IZ 170413.00, California Academy of Sciences 2013); Alameda/CA/San Francisco Bay (1898, ANSP 77896, Academy of Natural Sciences of Philadelphia 2013; Carlton 1979; Cohen and Carlton 1995); CA/South San Francisco Bay (Cohen and Carlton 1995); San Leandro Marina/CA/South San Francisco Bay (2004, Cohen et al. 2005); Brisbane/CA/Brisbane Lagoon, South San Francisco Bay (2004, Cohen et al. 2005). Coyote Point, San Mateo County/CA/South San Francisco Bay (CAS-IZ 126854.00, California Academy of Sciences 2013, Washed ashore) ; Redwood City/CA/Redwood City Harbor entrance channel (1973, CAS-IZ 143848.00, California Academy of Sciences 2013); It occurs on shells of Ostrea lurida (Olympic Oyster), Ilyanassa obsoleta (Eastern Mudsnail), and other substrates (Carlton 1979)