Invasion
Invasion Description
1st Record: Hunters Point Naval Shipyard/CA/San Francisco Bay (1948, Cohen and Carlton 1995);
Geographic Extent
Hunters Point Naval Shipyard/CA/San Francisco Bay (1948, Cohen and Carlton 1995); Sausalito/CA/San Francisco Bay (1949, Barnard 1950); Tiburon/CA/San Francisco Bay (1949, Barnard 1950); Oakland/CA/Lake Merritt (Carlton 1979); San Mateo County, Coyote Point Marina: Gate 12, inner floating dock/CA/South San Francisco Bay (2001, CAS IZ 159607, California Academy of Sciences 2015)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Economic Impact | Shipping/Boating | |
| 'Very abundant' in pilings (Barnard 1950); apparently increasing the size of burrows made by gribbles (Limnoria spp.) and the erosibility of wood (Barnard 1955) | ||