NAS - Nonindigenous Aquatic Species

Specimen Information

Dreissena polymorpha
(zebra mussel)
Exotic to United States

Specimen ID293221
Common Namezebra mussel
CountySan Benito
Localitypump in Hollister at Ridgemark Golf Course
Mapping AccuracyAccurate
HUC8 NamePajaro
HUC8 Number18060002
Collection Day25
Collection Month10
Collection Year2012
Year AccuracyActual
Pathwayhitch hiker fishing, boating | dispersed
CommentsFive mussels found alive in the Diablo pump (uppermost pump in the system). The source of these mussels came from untreated water from San Justo Reservoir, already infested with zebra mussels.
Record TypePersonal communication
VerifierCalifornia Dept. of Fish and Game
Fresh Marine IntroFreshwater
Number Collected5 live

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Page Contact Information: Pam Fuller - NAS Program (
Page Last Modified: Wednesday, January 08, 2014


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. [2015]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [11/24/2015].

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