Invasion

Invasion Description

1st record: WA/Puget Sound (Galtsoff 1929, cited by Carlton 1979; Hanna 1996

Geographic Extent

Campbell River, Vancouver Island)/British Columbia/Strait of Georgia (2008, Choi et al. 2016); Ladysmith (Vancouver Island)/British Columbia/Strait of Georgia (1933, Elsey 1933, cited by Carlton 1979; Quayle 1969, no longer present); British Columbia-WA/Boundary Bay (Sherwood 1931, cited by Carlton 1979; Carl and Giguet 1973); Bellingham/WA/Bellingham Bay (pre-1930s, Carlton 1979, 4 specimens, not established?); Skagit County/WA/Samish Bay (Hopkins 1937, cited by Carlton 1979); Skagit County/WA/Padilla Bay (Carriker 1955, Carlton 1979; Riggs 2011); WA/Puget Sound (Galtsoff 1929, cited by Carlton 1979; Hanna 1966)