| Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
|
260749
| BC | | Strait of Georgia | 2007 |
17110002
| Strait of Georgia | established |
|
161218
| WA | | Puget Sound | 1939 |
17110019
| Puget Sound | established |
|
162217
| WA | | Puget Sound | 2000 |
17110019
| Puget Sound | established |
|
241508
| WA | Mason | Oakland Bay, Port of Shelton Marina, Shelton, at the end of Hammersley Inlet. | 1998 |
17110019
| Puget Sound | established |
|
260883
| WA | San Juan | Friday Harbor Laboratories, San Juan Island | 1974 |
17110003
| San Juan Islands | established |
|
260885
| WA | Skagit | Padilla Bay, Puget Sound, near start of dyke trail. | 1998 |
17110002
| Strait of Georgia | established |
|
241507
| WA | Skagit | Samish Bay, small float in Samish River near Edison. | 1998 |
17110002
| Strait of Georgia | established |
|
241116
| WA | Thurston | Eld Inlet, Mud Bay | 2000 |
17110019
| Puget Sound | established |