Invasion

Invasion Description

1st record: Whatcom County/WA/Bellingham Bay (Puget Sound) (1926, Dall 1926, cited by Carlton 1979)

Geographic Extent

Whatcom County/WA/Bellingham Bay (Puget Sound) (1926, Dall 1926, cited by Carlton 1979); Vancouver/British Columbia/Vancouver Harbour (2007-2009, Sylvester et al. 2011, one live specimen on sea-chest cover)