Invasion

Invasion Description

1st Record (established): Aquatic Park, San Francisco/CA/San Francisco Bay (1939, Rogers 1939, cited by Carlton 1979); 1939, Rogers 1949, as B. a. franciscanus). 1st record: US Submarine Narwhal, fouling, Mare Island Shipyard/CA/San Francisco Bay (1929, Carlton 1979)

Geographic Extent

Aquatic Park, San Francisco/CA/San Francisco Bay (1939, Rogers 1949, cited by Carlton 1979); 1939, Rogers 1949, as B. a. franciscanus); Oakland/CA/Lake Merritt (1941, 1952, Carlton 1979); Berkeley Aquatic Park/CA/San Francisco Bay (1952, Henry and McLaughlin 1975; Carlton 1979); Alviso/CA/pond near Alviso Slough (22°C, 52 ppt, Cohen 2005); Coyote Point/CA/San Francisco Bay (Cohen 2005); Fruitvale Bridge, Alameda/CA/Oakland Estuary (2004, Cohen et al. 2005); San Francisco Marina/CA/San Francisco Bay (2010, Marrafini et al. 2017); CA/San Francisco Bay (2014, 2015, Ruiz and Geller 2021)