Invasion

Invasion Description

1st record: WA/Willapa Bay (Sayce and Tufts 1970, cited by Carlton 1979);

Geographic Extent

WA/Grays Harbor (1976, Carlton 1979); (Burch 1946, cited by Carlton 1979); Bay City/WA/Willapa Bay (Sayce and Tufts 1970, cited by Carlton 1979); Pacific County/WA/Stackpole Slough, Willapa Bay (2000, Cohen et al. 2001); CA/Humboldt Bay (1935, planted with oyster shipments, not established, Carlton 1979; not mentioned by Boyd et al. 2002)