| Specimen ID | 261571 |
| Group | Mollusks-Bivalves |
| Genus | Arcuatula |
| Species | senhousia |
| Common Name | Asian date mussel |
| State | WA |
| County | Jefferson |
| Locality | Oak Bay State Park, marsh on north side of road. |
| Mapping Accuracy | Accurate |
| HUC8 Name | Puget Sound |
| HUC8 Number | 17110019 |
| HUC10 Name | Chimacum Creek-Frontal Port Ludlow |
| HUC10 Number | 1711001908 |
| HUC12 Name | Marrowstone Island-Frontal Port Townsend |
| HUC12 Number | 171100190803 |
| Map | |
| Collection Day | 27 |
| Collection Month | 5 |
| Collection Year | 2009 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker with oysters |
| Status | established |
| Comments | Found six complete mussel shells but no live specimens. |
| Record Type | Personal communication |
| Verifier | George Holm |
| Freshwater/Marine | Marine-Brackish |
| Photo | |
