Invasion

Invasion Description

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

Geographic Extent

Whatcom County/WA/Samish Bay (1924, Kincaid 1947 cited by Hanna 1966; Carlton 1979) Ladysmith, Vancouver Island/British Columbia/Ladysmith Harbour (1951, Carlton 1979, reproducing population eradicated by hand-picking)