Invasion

Invasion Description

1st Record: on highway 30 between Portland and Scappoose./OR/Multnomah Channel, WillametteRiver (2 specimens) (USGS Nonindigenous Aquatic Species Program 2006, 2 specimens)

Geographic Extent

on highway 30 between Portland and Scappoose./OR/Multnomah Channel, Willamette River River (2 specimens) (USGS Nonindigenous Aquatic Species Program 2006)