Invasion

Invasion Description

1st Record: Berkeley/CA/San Franciusco Bay (1 specimen)

Geographic Extent

Berkeley/CA/San Francisco Bay (1968, Carlton 1969, 1 specimen); Alameda and Bay Farm Islands/CA/San Francisco Bay (1969-1977, 14 specimens, Carlton 1979); Selby/CA/San Pablo Bay (1976, Carlton 1979), San Francisco/CA/San Francisco Bay, 1 specimen, 1995, Cohen and Carlton 1995); Coast Guard Island/CA/San Francisco Bay (June 2002, Andy Chang, personal communication 2007, 1 specimen); Dumbarton Pier/CA/San Francisco Bay (9/18/2002) approximately 415 snails, Andy Chang, personal communication 2007; Chang et al. 2011); Middle Harbor Park, Oakland/CA/San Francisco Bay (1 specimen, 2005, Paul Fofonoff, personal observation); Foster City/CA/San Francisco Bay (June 2007, n = 13, Andy Cohen, Andy Chang, personal communication 2007; Chang et al. 2011); Ashby Spit/CA/San Francisco Bay (July 2007, pprox. 100, Chela Zabin and Sarikka Attoe (Andy Chang, personal communication 2007; Chang et al. 2011)