Known from the Mekong basin. Found in the middle Xe Bangfai (Ref. 27732) and 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). Occurs during dry season in deep slow reaches of the Mekong basin at Muang Khong (Ref. 37769). Migrates upstream in December-March and appears to engage in two separate types of migration at Hat Village, Muang Khong: the first an upstream reproductive migration arriving in the Muang Khong area in late December and early January and the second, a post-spawning movement which may have a trophic component (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). Also Ref. 4792, 30857, 36654, 37767, 56905.