| Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
|
156986
| WA | | coastal waters | 1997 |
17100102
| Queets-Quinault | established |
|
1820
| WA | | coastal waters | 1998 |
17100102
| Queets-Quinault | established |
|
163822
| WA | | Willapa National Wildlife Refuge | 2005 |
17100106
| Willapa Bay | 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 |
|
241192
| WA | Pacific | Willapa Bay, Goose Point | 2000 |
17100106
| Willapa Bay | established |
|
241196
| WA | Pacific | Willapa Bay, Omeara Point | 2000 |
17100106
| Willapa Bay | established |
|
241194
| WA | Pacific | Willapa Bay, Palix River Bridge | 2000 |
17100106
| Willapa Bay | established |
|
241193
| WA | Pacific | Willapa Bay, Port of Bay Center | 2000 |
17100106
| Willapa Bay | established |
|
241195
| WA | Pacific | Willapa Bay, Stackpole Slough | 2000 |
17100106
| Willapa Bay | 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 |