Specimen Information

Dreissena polymorpha
Dreissena polymorpha
(zebra mussel)
Mollusks-Bivalves
Exotic

Specimen ID1932826
GroupMollusks-Bivalves
GenusDreissena
Speciespolymorpha
Common Namezebra mussel
StateTX
CountyMedina
LocalityDiversion Lake (private access only) at boat dock near the dam
Mapping AccuracyAccurate
HUC8 NameMedina
HUC8 Number12100302
HUC10 NameMiddle Medina River
HUC10 Number1210030203
HUC12 NameDiversion Lake-Medina River
HUC12 Number121003020305
Map
Collection Day26
Collection Month7
Collection Year2022
Year AccuracyActual
CommentsReported to TPWD by Bandera County River Authority and Groundwater District staff; established population, multiple size classes detected; private access for lakefront landowners only
Record TypeNAS sighting report
VerifierM. McGarrity, Texas Parks and Wildlife Department
Number Collected10
Year Classmultiple


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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 [7/9/2026].

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