The barredtail corydoras or Cochu's catfish, Corydoras cochui, is a tropical freshwater fish belonging to the Corydoradinae sub-family of the Callichthyidae family. It originates in inland waters in South America, and is found in the Upper Araguaia River basin in Brazil. It was originally described by George S. Myers & Stanley H. Weitzman in 1954. In the system of "C-Numbers" developed by the German fishkeeping magazine DATZ to identify undescribed species of Corydoras in the aquarium hobby, this fish had been assigned number "C22" until it was correctly identified.