Invasion

Invasion Description

1st Record: Malibu/CA/Malibu Creek (1971, USGS Nonindigenous Aquatic Species Program 2018, between mouth and dam 3 miles north now flowing out to sea on surface, even at low tide), 1st Record: San Diego County/CA/San Mateo Creek Lagoon (1974-2008, Swift et al. 2018,1 fish during periods of heavy freshwater flow, absent during seawater inflow)

Geographic Extent

Santa Monica/CA/Malibu Creek between mouth and dam 3 miles north now flowing out to sea on surface, even at low tide (1971, USGS Nonindigenous Aquatic Species Program 2014), San Diego/CA/San Diego River. just above and below upper limit of tidewater and Interstate 405 (1973, USGS Nonindigenous Aquatic Species Program 2014), Malibu/CA/Malibu Creek (1971, USGS Nonindigenous Aquatic Species Program 2018, between mouth and dam 3 miles north now flowing out to sea on surface, even at low tide), San Diego County/CA/San Mateo Creek Lagoon (1974-2008, Swift et al. 2018,1 fish during periods of heavy freshwater flow, absent during seawater inflow)