| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| United States (contiguous states) | Cape Cod Canal (at 5 m depth) | 1967 - | common | 84099 | |
| 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 | |
| Canada | Nova Scotia, Gulf of Maine, Nova Scotia | - | very common | 84099 |