Found in Mekong, Chao Phraya, Maeklong, Salween, Peninsular and Southeast Thailand river systems (Ref. 26336). In Chiang Khong and Nong Khai Provinces, it is uncommon in the Mekong River, but common in small streams and canals (Ref. 37770). At Mukdahan, it migrates from the Mekong River into its tributaries (Ref. 37770). Museum: Mekong mainstream between Pak Ing and Jom Paeng (about 4-5 km downstream), CAS 96774 (Ref. 5515); also from Tale Sap Songkhla, Bangkok, Metang (Chiang Mai), Mepoon (Phrae), Phitsanulok, Rayong, Phra Nakhon Si Ayutthaya, Uthai Thani and Bung Borapet (Nakhon Sawan) (Ref. 37773). Also Ref. 9648, 36654, 57235.