Treur River barb

The Treur River barb, also called the Treur barb, is a small freshwater fish of the carp and minnow family, Cyprinidae, known to science as Enteromius treurensis. It is endemic to the northern part of Mpumalanga province in South Africa, where it lives in the upper catchment of the Blyde River system. Its range has been squeezed by introduced predators. Exotic fish such as smallmouth bass, brown trout and rainbow trout were put into the Blyde, and the barb retreated to the upper catchments of the river system. It vanished from the Treur River itself in the 1960s, but a population was rediscovered in the upper Blyde River during the 1970s, in an area that received National Heritage status in 1985. The fish has since been reintroduced to both the Treur and the upper Blyde rivers, where it now flourishes. It shares its water with the Natal mountain catfish, Amphilius natalensis, which here forms an isolated population within the Limpopo system.