nounpl. (see fish) -·fish·, -·fish·es
any of several small, nearly extinct killifishes (genus Cyprinodon) found in desert springs of W North America
nounpl. pupfish, or pup·fish·es
Any of various small deep-bodied fishes of the family Cyprinidontidae, chiefly found in isolated habitats such as desert springs and streams of Mexico and the southwest United States.