1st Record: CA/Tomales Bay (1875, Barrett 1963, cited by Carlton 1979)

CA/Tomales Bay (1875, decline after 1900, holding of adult oysters continued to 1970s, Barrett 1963, cited by Carlton 1979)

Level	Vector
Probable	Oyster Intentional

Ecological Impact		Parasite/Predator Vector
While C. virginica has not become established in central California waters, Eastern Oyster introductions have been a probable/possible vector for many fouling organisms and predators including Cliona sp. (boring sponges) and other sponges, polychaetes [Alitta (=Neanthes, Nereis), Streblospio benedicti], Atlantic Oyster Drill (Urosalpinx cinerea), tube-dwelling amphipods (Ampelisca, Ampithoe, Monocorophium spp.) and tunicates (Brtryllus schlosseri, Molgula manhattensis) (Carlton 1979; de Rivera et al. 2005).

Species Regional Summary Crassostrea virginica Tomales Bay ( P110 )