1) American flagfish 2) Fish 3) Jordanella floridae 4) Killifish 
The flagfish or American flagfish, Jordanella floridae, is a pupfish native to Florida. It received its name because the male fish resembles the American flag, with a large black/blue dot and alternating red and black/blue stripes on its body. It is a common, native fish in Florida that is occasionally found in fish stores. They make quick work of...
[n] - flagfish with a dark-blue back and whitish sides with red stripes
American flagfish noun a fish with a dark-blue back and whitish sides with red stripes; found in swamps and streams of Florida
Also calleda killifish, Jordanella floridae, inhabiting swamps and streams of Florida, having a blue-brown back and whitish sides with red stripes, often kept in aquariums. · any of several other brightly colored fishes.