Invasion
Invasion Description
1st Records: Los Angeles-Long Beach/CA/Los Angeles-Long Beach Harbors (as J. fancata, Barnard 1958); CA/San Diego Bay (Conlan 1990); La Jolla/CA/(Conlan 1990); Bird Rock, Catalina Island/CA/Pacific Ocean (Conlan 1990); Catalina Island/CA/Avalon Harbor (Conlan 1990)
Geographic Extent
CA/San Diego Bay (Conlan 1990; 2011, California Department of Fish and Wildlife 2014); La Jolla/CA/(Conlan 1990); Bird Rock, Catalina Island/CA/Pacific Ocean (Conlan 1990); Catalina Island/CA/Avalon Harbor (Conlan 1990); Los Angeles-Long Beach/CA/Los Angeles-Long Beach Harbors (as J. fancata, Barnard 1958); Long Beach Yacht Club/CA/Alamitos Bay (2000, Cohen et al. 2002); Pilots' Dock, Pier F, Long Beach/CA/Long Beach Harbor (2000, Cohen et al. 2002); Newmark's Yacht Harbor , Los Angeles/CA/Los Angeles Harbor (2000, Cohen et al. 2002); Port Hueneme/CA/ Port Hueneme (2001, Fairey et al. 2002); Jack's Landing /CA/Channel Island Harbor (2000, Cohen et al. 2002); Baja California.Mexico/Magdalena Bay (Conlan 1990)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Economic Impact | Shipping/Boating | |
| Jassa marmorata fouls pilings in Los Angeles-Long Beach Harbor, covering them with masses of tubes covered with sediment, but perhaps provides a benefit by discouraging boring organisms (Barnard 1958). | ||
| Ecological Impact | Habitat Change | |
| Dense masses of amphipod tubes may discourage settlement by boring organisms and other foulers, such as the tunicate Ciona intestinalis (Barnard 1958). They also may provide habitat for other organisms, such as predatory polychaetes (Barnard 1950). | ||