| Specimen ID | 1658406 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | bugensis |
| Common Name | quagga mussel |
| State | CA |
| County | Los Angeles |
| Locality | Castaic Lake, north of Los Angeles |
| Mapping Accuracy | Accurate |
| HUC8 Name | Santa Clara |
| HUC8 Number | 18070102 |
| HUC10 Name | Castaic Creek |
| HUC10 Number | 1807010203 |
| HUC12 Name | Middle Castaic Creek |
| HUC12 Number | 180701020305 |
| Map | |
| Collection Day | 6 |
| Collection Month | 8 |
| Collection Year | 2021 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed |
| Status | unknown |
| Reference 1 |
| Ref. Number: | 36854 |
| Author: | California Department of Water Resources |
| Date: | 2021 |
| Title: | Quagga Mussel Discovery at Castaic Lake: Boating Requirements Implemented |
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| Comments | On August 6, 2021, a Castaic Lake park visitor reported finding one adult quagga mussel while kayaking in Castaic Lake (Los Angeles County). The specimen was confirmed as a quagga mussel by the California Department of Fish and Wildlife (CDFW) via genetic analysis. On August 17, 2021, Department of Water Resources and CDFW staff discovered a half shell (dead) quagga mussel and a full shell (dead) quagga mussel along the shoreline of Castaic Lake. On August 24, 2021, CDFW found a full shell (dead) quagga mussel attached to a rock along the shoreline. |
| Record Type | NAS sighting report |
| Verifier | California Department of Water Resources |
| Freshwater/Marine | Freshwater |
| Number Collected | 4 |
| Photo | |
