Invasion

Invasion Description

1st Records: WA/Grays Harbor (1974, Hobson 1976, cited by Carlton 1979); Newport/OR/Yaquina Bay (Walker 1974, cited by Carlton 1979)

Geographic Extent

WA/Grays Harbor (1974, Hobson 1976, cited by Carlton 1979; Wilson and Partidge 2007); Cohassett Beach/WA/Beardslee Slough (1999, Wilson and Partidge 2007); WA/Upper Palix River, Willapa Bay (2000, Cohen et al. 2001), Palix River Bridge/WA/Willapa Bay 2000, Cohen et al. 2001), Round Island/WA/Willapa Bay 2000, Cohen et al. 2001; Wilson and Partidge 2007); OR-WA/Columbia River Estuary (1990, Sytsma et al. 2004); Ilwaco/WA/Baker Bay, Columbia River Estuary (2002, Sytsma et al. 2004); OR/Tillamook Bay (1996, Golden et al. 1998, cited by Cohen 2004); Newport/OR/Yaquina Bay (Walker 1974, cited by Carlton 1979; Castillo et al. 2000); Reedsport/OR/Umpqua River Estuary (1983, Carlton 1989); OR/Coos Bay (Jeffries 1977, cited by Carlton 1989); ); Coos Bay/OR/South Slough (Posey 1984, cited by Carlton 1989); various locations throughout Bay/OR/Coos Bay (Carlton 1989); Oregon Institute for Marine Biology, Charleston/OR/Coos Bay (2010, Zakas and Wares 2012); CA/Humboldt Bay (1992, Boyd et al. 2002); Bracut/CA/Mad River Slough (2000, Boyd et al. 2002); Bracut/CA/Elk River (2000, Boyd et al. 2002); Southport Landing/CA/Humboldt Bay) (2000, Boyd et al. 2002) Eureka/CA/Eureka Channel, Humboldt Bay (2000, Boyd et al. 2002)