Specimen Information

Limnoperna fortunei
Limnoperna fortunei
(Golden Mussel)
Mollusks-Bivalves
Exotic

Specimen ID1932814
GroupMollusks-Bivalves
GenusLimnoperna
Speciesfortunei
Common NameGolden Mussel
StateCA
CountyContra Costa
LocalityContra Costa Canal. Underground siphon near Lockwood Ln.
Mapping AccuracyAccurate
HUC8 NameSuisun Bay
HUC8 Number18050001
HUC10 NameWalnut Creek-Frontal Suisin Bay Estuaries
HUC10 Number1805000102
HUC12 NameWalnut Creek-Frontal Suisin Bay Estuaries
HUC12 Number180500010204
Map
Collection Day10
Collection Month4
Collection Year2026
Year AccuracyActual
CommentsSporadic large adults found in underground siphon of Contra Costa Canal's Loop Canal section near Lockwood Ln. in Pleasant Hill. The canal is already confirmed as containing golden mussels upstream and downstream of this location.
Record TypeNAS sighting report
VerifierJ. Trueman, California Department of Fish and Wildlife
Year Classadult
Photo
Two adult golden mussels rest on a ruler, measuring about 2cm and 3cm each.


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The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/31/2026].

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