Any of a number of tiny fish in the Cyprinodontiformes order of ray-finned fish.

plural of killifish

A topminnow of the species Fundulus diaphanus

a species of pupfish native to the southeastern United States, Mexico and northern Central America, taxonomic name Floridichthys carpio

An aquarium variant of the striped panchax (Aplocheilus lineatus) with a more yellowish coloration.