Specimen Information

Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
Point Map
Species Profile
Animated Map

Specimen ID1886694
GroupFishes
GenusGambusia
Speciesaffinis
Common NameWestern Mosquitofish
StatePA
CountyCrawford
LocalityPymatuning Lake, at Linesville boat ramp
Mapping AccuracyAccurate
HUC8 NameShenango
HUC8 Number05030102
HUC10 NamePymatuning Reservoir-Shenango River
HUC10 Number0503010201
HUC12 NameLinesville Creek-Frontal Pymatuning Reservoir
HUC12 Number050301020102
Map
Collection Day17
Collection Month9
Collection Year2025
Year AccuracyActual
Potential Pathwaydispersed | unknown
Statusestablished
CommentsCollected incidentally by Pennsylvania Fish and Boat Commission staff during an aquatic vegetation survey. ID confirmed via microscopy of male specimens. Appears to be an established population.
Record TypeNAS sighting report
VerifierPennsylvania Fish and Boat Commission
Freshwater/MarineFreshwater
Photo
Western Mosquitofish on fingertips
Microscope photo of Western Mosquitofish gonopodium

Disclaimer:

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. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/4/2025].

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For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.