The flagtails are a family of perciform fish of the Indo-Pacific area. The family consists of several species in one genus, Kuhlia. Most are euryhaline and often found in brackish water, but the genus also includes species restricted to marine or fresh water.
Flagtail characins are a microphagous species, one whose diet consists primarily of detritus and other fine material rich in microorganisms which are found in the substrate. At the Zoo, they eat a gel diet. An oviparous, or egg-laying, species, flagtail characin migrate upriver to spawn.