Occurs in the Mekong and the lower and middle Xe Bangfai (Ref. 27732). Found 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). Undertakes upstream and downstream migrations during the wet season in June-July through Hoo Som Yai at the Great Fault Line on the Mekong River, Champassack Province (Ref. 37771). Reported to migrate upstream during the dry season in December/March in Southern Laos (Ref. 37769). Museum: Mekong at Ban Hang Khone, just below Khone falls, CAS 94789 (Ref. 5515). Also Ref. 7424, 10421, 30857, 36654, 37767, 43281, 56905.