The Parras pupfish (Cyprinodon latifasciatus) is a small species of freshwater pupfish in the family Cyprinodontidae. It is endemic to the Laguna de Mayrán basin in southern Coahuila, Mexico.[1] This species was widely thought to be extinct, 1903 being the date of the last recorded observation and it was declared to be extinct in 1930 until a single specimen was accidentally collected from an irrigation canal, in the town of Parras de la Fuente in 2012.