Known from Mekong River (Ref. 30857). 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). Collected from Tha Ngon, Tha Bo and Hatsalao of the Mekong basin (Ref. 4792). Enters flooded forest on Don Khone, just below the great waterfalls (Ref. 9497). Observed to undergo migration at the fishing village of Ban Wernsonkhram on Don Hat (Hat Island) above the Lee Pee Waterfalls (Ref. 10431). Also undertakes upstream migration during the wet season in May-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/February in Southern Laos (Ref. 37769). The most dominant fish in catches at Don Khong (Khong Island), just above Lee Pee Waterfalls from 29 October through 11 December 1993 (Ref. 10431). Caught all year long, but particularly abundant at the end of the year according to Khong Island fishermen (Ref. 10431). Museum: Mekong at Ban Hang Khone, just below Khone falls, CAS 94890 (Ref. 5515). Also Ref. 36654, 37769, 37767, 44002, 56905.