Abstract: This study conducted between April 2008 to March 2009, aimed revision of ihtiyofauna of the Seyhan and Ceyhan river Basins, determined that 35 species and one sub-species belonging to Anguillidae, Salmonidae, Cyprinidae, Nemacheilidae, Cobitidae, Clariidae, Siluridae, Cyprinodontidae, Poecilidae, Blenniidae and Percidae. In this study, Alburnus baliki and Cobitis levantina was recorded for the 1st time in the Ceyhan river and Nemacheilus namiri in the Seyhan river Basins. Samples of Capoeta turani described in the Seyhan river Basin and Capoeta erhani described in the Ceyhan river Basin have been caught in large quantities and examined in different locations in these Basins and these species have been accepted as a synonym of Capoeta barroisi.