and at least one, Hyphessobrycon flammeus, is believed to be highly threatened. This species only occurs in a few rivers and streams in coastal Rio de Janeiro State and in São Paulo State. Three other species are recognized as threatened in Brazil: H. coelestinus, H. duragenys, and H. taurocephalus. Many Hyphessobrycon species are popular aquarium fish, and some, including H. flammeus, are bred in large numbers in captivity. Species The 156 currently recognized species in this genus are: References Characidae Taxa named by Marion Durbin Ellis Fish of South America Freshwater fish genera Tetras