What is "flagfish"

n. flagfish with a dark-blue back and whitish sides with red stripes; found in swamps and streams of Florida [syn: American flagfish, Jordanella floridae]

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 hair algae and they may also eat plants in a planted aquarium.

Jordanella after one month in normal water for the first batch, and in water containing traces of mercury (respectively 0.6PPB and 2.5PPB and 1.26PPB (parts per billion) of methylmercury for the 3 bottles at right.
American Photography archive (1973) "National water quality laboratory" (USA)