Invasion
Invasion Description
1st Record: WA/Willapa Bay (1939, Hanna 1939, cited by Carlton 1979)
Geographic Extent
WA/Willapa Bay (1939, Hanna 1939, cited by Carlton 1979); found in 13 of 20 sites sampled in Willapa Bay, more abundant towards mouth of Bay, Ruesink 2013; Buhle and Ruesink 2009)
Vectors
Level | Vector |
---|---|
Probable | Oyster Accidental |
Regional Impacts
Economic Impact | Fisheries | |
A pest of cultured Pacific oysters, especially seed oysters in Willapa Bay (Buhle and Ruesink 2009) | ||
Ecological Impact | Predation | |
Predator on introduced Pacific Oysters (Crassostrea gigas) and native Olympia Oysters (O. lurida) in Willapa Bay, preferring the former in feeding experiments (Buhle and Ruesink 2009). | ||