Specimen Information

Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Native Transplant

Specimen ID1711180
Common NameWestern Mosquitofish
LocalityGrubb Lake, the sandy shoreline near the playground and shelters
Mapping AccuracyAccurate
HUC8 NameLower Susquehanna
HUC8 Number02050306
HUC10 NameChickies Creek
HUC10 Number0205030608
HUC12 NameLower Chickies Creek
HUC12 Number020503060804
Collection Day31
Collection Month5
Collection Year2022
Year AccuracyActual
Potential Pathwaystocked for biocontrol | dispersed
CommentsGambusia were already reported in Grubb Lake; my student and I confirmed they are indeed G. affinis based on the lack of spines on the third ray of the gonopodium (see image below). 100 is a very rough estimate of what we saw; based on our observation there are far more in the lake.
Record TypeNAS sighting report
Number Collected100


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Citation information: U.S. Geological Survey. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [9/25/2023].

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