Freshwater Fishes of the Pahang River Basin, Malaysia presents the results of an extensive survey of freshwater fishes that was conducted in the Pahang River Basin between August 1992 and March 1993. Fishes and their habitats were surveyed in the upper, middle and lower reaches of the Pahang River Basin, its tributaries and two large natural lakes namely, Tasek Bera and Tasek Chini. The National Park (Taman Negara) located upstream of the Pahang River (sensu stricto) is a protected watershed and was not included in the present study.
A total of 167 species of fish belonging to 38 families were found in 98 sites in the main river, its tributaries, Tasek Bera and Tasek Chini. The species list is by no means complete and may increase in fture if the study is extended to sites not investigated in this survey. Tentatively 36 species were found to be new records for the State of Pahang and 8 species were new country records, including Patin Muncung Helicophagus cf waandersii and Clupeichthys cf. aesarnensis. The study also indicated that 61 species are common and widely distributed throughout the basin while 52 species are sporadic but widely distributed. Of the total, 79 species are food fish, 93 species are aquarium fish and 8 species are sport fish. Four species are exotics, four endangered and three threatened by commercial over-fishing.