Oreichthys is a genus of tropical barbs found in Thailand, India, Bangladesh, Myanmar (Burma), northern Malay Peninsula, and the Mekong basin in Laos.

[1] The genus Oreichthys (Smith 1933) was originally established to receive little fish collected in a small brook on Kao Sabap, an extensive mountain range near Chantaburi, Thailand.

[2] These are the currently recognized species in this genus:[3] All Oreichthys, with the exception of O. crenuchoides, possess a triangular-looking body, with the face being pointed.

The head is marked by numerous fine rows of pores, mostly in parallel groups on the snout, cheeks, interorbital space, and operuclar bones.

Thailand, India, Bangladesh, Myanmar (Burma), northern Malay Peninsula, and the Mekong basin in Laos.