Invasion

Invasion Description

1st Established Record: Richmond Marina/CA/San Francisco Bay (2001, Blum et al. 2007)
1st record: Mare Island/CA/San Francisco Bay (failed) (1929, Carlton 1979, bottom of USS Narwhal, submarine)

Geographic Extent

Richmond Marina/CA/San Francisco Bay (2001, Blum et al. 2007); Mare Island/CA/San Francisco Bay (failed, 1929, Carlton 1979); CA/San Francisco (2015, Ruiz and Geller 2021); CA/Morro Bay (2006, Needles 2007; Needles and Wendt 2012)