The tinfoil barb (Barbonymus schwanenfeldii) is a tropical freshwater fish belonging to the Barbonymus genus of the Cyprinidae family. Originating in the Mekong and Chao Phraya basins of Thailand, and Sumatra, Borneo, and Malayan peninsula. This species was originally named Barbus schwanenfeldii by Pieter Bleeker in 1853, and has also been referred to as Puntius schwanenfeldii, Barbodes schwanenfeldii, and the specific epithet has also been referred to as schwanefeldii.