Invasion

Invasion Description

1st Record: Skagit County/WA/Samish Bay (Hopkins 1937, cited by Carlton 1979);

Geographic Extent

Skagit County/WA/Samish Bay (Hopkins 1937, cited by Carlton 1979); Skagit County/WA/Padilla Bay (Carriker 1955, Carlton 1979; Riggs 2011)