Department of Environmental Conservation

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Family: Poeciliidae

The family is native to lower elevations of the eastern United States, Argentina and Africa. The only species that is established in NY is native to areas south of Kentucky, Illinois and Missouri. It is also known to occur in salt waters in coastal areas. Some species have all-female individuals. The eggs can develop when stimulated by the sperm without fertilization.

Western Mosquitofish

Gambusia affinis

Image of a Western Mosquitofish

Western Mosquitofish live in quiet backwaters and ditches. It is native to the southern US and is apparently intolerant of temperate winter conditions. It has been established in two watersheds near NYC since only 1979.

Fish atlas map for Mosquitofish.