Invasion
Invasion Description
1st Record: Long Beach/CA/Los Angeles-Long Beach Harbors (1984) (Lambert and Lambert 1998)
Geographic Extent
Huntington Beach/CA/Huntington Harbor (2001, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014); Long Beach Marina/CA/Spinnaker Cove, Alamitos Bay (1997, Lambert and Lambert 1998; Lambert and Lambert 2003);Long Beach/CA/Long Beach Harbor (2001, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014); Long Beach/CA/Los Angeles-Long Beach Harbors (1984) (Lambert and Lambert 1998); Impound Marina, Long Beach/CA/Los Angeles-Long Beach Harbors (1995, 1996, 1997, 1998, Lambert and Lambert 1998; Lambert and Lambert 2003); Watchorn Marina, Long Beach/CA/Los Angeles-Long Beach Harbors (1995, 1996, 1997, 1998, 2000, Lambert and Lambert 1998; Lambert and Lambert 2003); Los Angeles/CA/Los Angeles Harbor (2002, Fairey et al. 2002); ; Los Angeles/CA/Port of Los Angeles outer bay (2013, Obazo and Williams 2018); CA/Long Beach Harbor (2017, Ruiz and Geller 2021); Los Angleles/CA/Spinnaker Cove Back Bay'/ (2020, Nichols et al. 2023)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| Ascidia zara has largely replaced the native Ascidia ceratodes in San Diego Bay (Lambert and Lambert 2003;). Ritter & Forsyth (1917) reported that Ascidia ceratodes and Pyura haustor, both native, were the most numerous solitary ascidians in South California in 1917. In 1995-2000, A. ceratodes was rare having been replaced by A. zara. | ||