Invasion
Invasion Description
1st record: Eureka/CA/Humboldt Bay (1876, Hemphill 1877, cited by Carlton 1979)
Geographic Extent
Westport/WA/Grays Harbor (1965, MacDonald 1969, cited by Carlton 1979); WA/Grays Harbor (1976, Carlton 1979); WA/Willapa Bay (Kincaid 1963, cited by Carlton 1979); Nahcotta/WA/Willapa Bay (Hanna 1966); OR/Tillamook Bay (1976, Cohen 2004; OR/Yaquina Bay (1978, Carlton 1979); OR/Alsea Bay (1978, Carlton 1979); OR/Pony Slough, Coos Bay (1965, MacDonald 1969, cited by Carlton 1979); OR/Coos Bay (Carlton 1989); Eureka/CA/Humboldt Bay (1876, Hemphill 1877, cited by Carlton 1979; Carlton 1979); Arcata/CA/Humboldt Bay (1965, MacDonald 1969); CA/Humboldt Bay ('common and abundant in marshes' Boyd et al. 2002)
Vectors
| Level | Vector |
|---|---|
| Alternate | Oyster Accidental |
| Alternate | Dry Ballast |
| Probable | Cargo |