Invasion

Invasion Description

1st Record- Astoria/OR/Youngs River-Youngs Bay (1957, Carlton 1979; Wonham et al. 2005, on crayfish Pacificastacus trowbridgei)

Geographic Extent

Astoria/OR/Youngs River/Youngs Bay (Carlton 1979; Wonham et al. 2005, on crayfish Pacificastacus trowbridgei); Astoria/OR/West Mooring Basin, Columbia River (2002, Sytsma et al., 2005); OR/Youngs River Mouth (2002, Sytsma et al., 2005)