Welcome to Catnapin's
order Cyprinodontiformes (tooth-carps) - family Poeciliidae (Live-bearing Fish)
Western Mosquitofish (Gambusia) Gambusia affinis
They look like guppies. Mature females grow up to 2 1/2" long, mature males about 1 1/2" long.
This little fish eats aquatic larva of mosquitoes. They have live births and are prolific breeders. Without a predator (like bass) the water surface will be covered in them. One year, we estimated 300,000 in a 2 acre pond.
Photos taken in Taylor County, June 2005, July 2006
(Native of Texas, introduced into our pond)