| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| United States (contiguous states) | Fox Hill Levels | 1959 - | absent | 84119 | |
| United States (contiguous states) | Gulf of Maine, inferred MA | - | very common | 84099 | |
| United States (contiguous states) | Gulf of Maine, inferred ME | - | very common | 84099 | |
| United States (contiguous states) | Gulf of Maine, inferred NH | - | very common | 84099 | |
| United States (contiguous states) | MD (Chesapeake Bay and its offshore waters) | - | absent | 84119 | |
| Canada | Nova Scotia, Gulf of Maine, Nova Scotia | - | very common | 84099 | |
| United States (contiguous states) | Public Landing | 1959 - | absent | 84119 | |
| United States (contiguous states) | VA, Chesapeake Bay and its offshore waters | - | absent | 84119 | |
| United States (contiguous states) | White Rock, s. (in the area of Franklin City) | 1959 - | extremely abundant | 84119 |