| Specimen ID | 1420928 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | rostriformis |
| Subspecies | bugensis |
| Common Name | quagga mussel |
| State | CA |
| County | Ventura |
| Locality | Piru Creek, lower, about 0.25 miles north of the confluence of Piru Creek with the Santa Clara River |
| Mapping Accuracy | Accurate |
| HUC8 Name | Santa Clara |
| HUC8 Number | 18070102 |
| HUC10 Name | Middle Santa Clara River |
| HUC10 Number | 1807010208 |
| HUC12 Name | Pole Creek-Santa Clara River |
| HUC12 Number | 180701020802 |
| Map | |
| Collection Day | 17 |
| Collection Month | 10 |
| Collection Year | 2017 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft | hitch hiker on small watercraft |
| Status | established |
| Comments | Streambed survey of 20 cobbles with median axis 10-20 cm. Cobbles had 0-2 quagga mussels attached to each. |
| Record Type | NAS sighting report |
| Verifier | United Water Conservation District |
| Freshwater/Marine | Freshwater |
| Size | between 5 and 10 mm |
