Invasion

Invasion Description

1st Record: Skagit County/WA/Samish Bay (1924, Kincaid 1947, cited by Carlton 1979);

Geographic Extent

Skagit County/WA/Samish Bay (1924, Kincaid 1947, cited by Carlton 1979); Skagit County/WA/Padilla Bay (Riggs 2011); Chuckanut Island, Whatcom County/WA/Bellingham Bay (1963, Carlton 1979);