Invasion
Invasion Description
1st Record: Long Beach/CA/Alamitos Bay (1960, Abbott and Johnson 1972)
Geographic Extent
Watchorn Marina/CA/CA/Los Angeles Harbor (1994, 1995, 1996, 1997, 1998, 2000); Impound Marina, Long Beach/CA/Long Beach Harbor (1994, 1995, 1996, 1997, 1998, 2000); Los Angeles/CA/Los Angeles Harbor (2001, Fairey et al. 2001; 2011, California Department of Fish and Wildlife 2014); CA/Long Beach Harbor (2017, Ruiz et al. 2021, 8 of 10 sites); Long Beach/CA/Alamitos Bay (1960, Abbott and Johnson 1972; Reish 1962, Reish 1963, cited by Carlton 1979); Long Beach Marina/CA/Alamitos Bay (1994, 1995, 1996, 1998, 2000, Lambert and Lambert 2003); Anaheim/CA/Anaheim Bay (1972, Reish et al. 1975); Huntington Beach/CA/Huntington Harbor (Reish 1972, cited by Carlton 1979); Huntington Beach/CA/Huntington Harbor (2001, Fairey et al. 2002)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| It and other introduced ascidians have replaced the native species Pyura haustor and Ascidia ceratodes in southern California harbors (Lambert and Lambert 1998). | ||