Known from the Mekong basin. A migratory species (Ref. 37772) found around the Tonle Sap river, Great Lake (Ref. 36651) and Sékong at Stung Treng (Ref. 36654). Juveniles and sub-adults migrate out of flooded areas back into the river at receding water and start migrating upstream in the Mekong. Reported to come down the Tonle Sap River into the Mekong. Constitutes an important part of the catch in the Tonle Sap River during December to February (Ref. 37770). Its numbers have declined below Khone Falls to the Tonle Sap River and the Great Lake (Ref, 37772). Also Ref. 7050, 33813, 36662, 43281, 45353.