Recorded from the Mekong basin. 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). At Ban Hang Khone its migrations formerly were exceeded in magnitude only by those of pa soi and pa dtaep (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). Above the Khone Falls, fishes migrate upstream during April-September which are dominated by adults. These are probably spawning migrations as mature fishes bearing eggs were observed in Xayabouri Province from April to September (Ref. 37770). Also migrates upstream during dry season in December/January at Hat Village, Muang Khong District (Ref. 37769). Its numbers have declined in the Khone Falls (Ref. 37772). Also Ref. 4792, 7050, 36654, 37767, 56905.