| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| Canada | British Colombia, BC (Strait of Juan de Fuca) | - | rare | 84122 | |
| United States (contiguous states) | Hood Canal | - | rare | 84122 | |
| United States (contiguous states) | Puget Sound, n. | - | rare | 84122 | |
| United States (contiguous states) | Puget Sound, S. | - | rare | 84122 | |
| United States (contiguous states) | San Juan Islands | - | rare | 84122 | |
| United States (contiguous states) | WA (Strait of Juan de Fuca) | - | rare | 84122 |