| Main Ref. | Carlton, J.T., 1985 |
| To | San Frnacisco Bay, California |
| FAO area | Pacific, Eastern Central |
| From | Western North Atlantic |
| FAO area | Atlantic, Northwest |
| Year | 1937 |
| Range | |
| Period | 1925-1949 |
| Established in the Wild | Unknown |
| Established in Aquaculture | |
| Significant Ecological Interactions | Unknown |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | biofouling |
| Other Reason | accidental |
| Comments | Introduced by fouling or boring into ships hulls and with oyster introductions. Also possibly via ballast water. Ref. Carlton, J.T., 1985 |