Occurs in the Mekong tributary, 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 migration during the wet season in July-August through Hoo Som Yai at the Great Fault Line on the Mekong River, Champassack Province (Ref. 37771). Reported to migrate during the dry season in December/January in Southern Laos (Ref. 37769). Questionably found in the lower and middle Nam Theun (Ref. 27732). Also Ref. 4833, 30857, 35669, 37767, 43281, 50526.