- killifish - small mostly marine warm-water carp-like schooling fishes; used as bait or aquarium fishes or in mosquito control
--1 is a kind of cyprinodont
--1 has particulars:mummichog, Fundulus heteroclitus; striped killifish, mayfish, may fish, Fundulus majalis; rivulus; flagfish, American flagfish, Jordanella floridae