Specimen Information

Dreissena bugensis
Dreissena bugensis
(quagga mussel)

Specimen ID1658406
Common Namequagga mussel
CountyLos Angeles
LocalityCastaic Lake, north of Los Angeles
Mapping AccuracyAccurate
HUC8 NameSanta Clara
HUC8 Number18070102
HUC10 NameCastaic Creek
HUC10 Number1807010203
HUC12 NameMiddle Castaic Creek
HUC12 Number180701020305
Collection Day6
Collection Month8
Collection Year2021
Year AccuracyActual
Potential Pathwaydispersed
Reference 1
Ref. Number:36854
Author:California Department of Water Resources
Title:Quagga Mussel Discovery at Castaic Lake: Boating Requirements Implemented
CommentsOn 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 TypeNAS sighting report
VerifierCalifornia Department of Water Resources
Number Collected4


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Citation information: U.S. Geological Survey. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/21/2023].

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