Occurs in the Mekong basin. Found in the middle Xe Bangfai, and the lower Nam Theun basins (Ref. 27732), and in Ban Hang Khone at Don Khone, 3 km below the fall line of the great waterfalls of the Mekong basin at Lee Pee (Ref. 9497). Collected from Tha Ngon, Sithan Tay, Hatsalao (Ref. 4792). Caught mainly in the deeper slower channels of the Muang Khong area (Mekong) and appears to avoid shallow rocky areas (Ref. 37769 ). Undertakes upstream non-reproductive migration in the Mekong mainstream at Hat Village, Muang Khong District from December to March/April (Ref. 37769 ). Observed to undergo migration and fished heavily at the fishing village of Ban Wernsonkhram on Don Hat (Hat Island) above the Lee Pee Waterfalls (Ref. 10431). Reported to migrate upstream from Pak Lay in Laos to Chiang Khong in Thailand between March and May, which starts when the first heavy rains of the monsoon season occur or when the river water color changes from relatively clear to reddish or brown. Also reported to make downstream migration from Pak Lay in October-November (Ref. 37770). Undertake upstream migration in Xe Done River between December and March (Ref. 37770). Also Ref. 30857, 36654, 37767, 43281, 50526, 56905.