Invasion

Invasion Description

1st Record: Stockton CA/Sacramento River (1908, Cohen and Carlton 1995)

Geographic Extent

CA/Sacramento-San Joaquin Delta (1908,Cohen and Carlton 1995; 1983-2003; Brown and Michniuk 2007); Walnut Grove/CA/North Fork Mokelumne River (Cavallo et al. 2012); CA/Suisun Marsh (1997, Matern et al. 2002,, rare); CA/San Pablo Bay (Ganssle 1966, cited by Cohen and Carlton 1995, occasional in winter); CA/North Fork Mokelumne River, Sacramento-San Joaquin Delta (2010, Cavallo et al. 2013)