Body very compressed and elongate, with convex ventral profile. Depth 3-3.5. Abdominal scutes present. Pelvic fins absent, fin very long, originates well before short dorsal fin. Dorsal fin originates well behind midpoint of body. Lowe jaw very prominent, mouth points upwards . Usual size 18-20 cm. Common in coastal waters but not abundant. Trawl, off Sarawak,South China Sea, 32-34 cm.