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Rivers in Indochinese subregion to Borneo, New Guinea and northern
Australia. Midle to Mekong Delta.
ลักษณะทางสัณฐานวิทยา :
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Disc rounded with short, slender snout tip; ventral and dorsal skin folds
on the tail absent. Dorsal surface with uniform brown or grey coloration,
ventral surface with wide black margin. Attains 2 m. disc width.
ระบบนิเวศ :
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Carnivorous, fishes and crustacean. Mainstreams to estuaries. Uncommon
foodfish in the markets. Overfishing.