Fishes of Georgia

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Fish Species Description

Western and eastern mosquitofish

Gambusia affinis and Gambusia holbrooki

(Baird & Girard, 1853)

western and eastern mosquitofish Species Photo


Order: Cyprinodontiformes
Family: Poeciliidae
Alternate Names:


Brackish, freshwater

western and eastern mosquitofish Region Map


Widespread stocking, hybridization, and mis-identification make it difficult to determine the distribution of mosquitofish in the state. We consider G. affinis to be native to the Coosa and Tennessee drainages. G. holbrooki is native to Coastal Plain portions of all Atlantic and Gulf coast drainages. Populations in the Upper Chattahoochee and Upper Savannah warrant further study.

Basin Distribution in Georgia:

Occurs in the Tennessee, Coosa, Tallapoosa, Chattahoochee, Flint, Ochlockonee, Suwannee, St. Marys, Satilla, Ocmulgee, Oconee, Altamaha, Ogeechee, and Savannah River basins.

Additional Information from
Georgia Department of Natural Resources:

Species Conservation Map: Exit icon

There is no conservation status map available for this species.

Click here for a description of the Conservation Status Map

Species Profile: Exit icon

There is no profile available for this species.

Click here to download an Adobe Acrobat version of the above map that also includes streams.