Distinguished by the following characters: mouth arched; upper lip smooth and with a deep median notch; lower lip with a median notch and two furrows on each side; processus dentiformis present and well developed; no incision in lower jaw; anterior nostril pierced in the front side of a tube; intestine with a bend at some distance behind stomach; lateral line complete, extending to caudal base; anus is situated about 1.0-1.5 eye diameters in front of anal fin origin; caudal fin slightly forked; 3-4 predorsal, 2 subdorsal and 4-5 postdorsal brown saddles on the back; body side with irregular dark brown blotches; dorsal fin with dark spots and caudal fin with irregular vertical rows of spots on rays; posterior chamber of air-bladder absent (Ref. 7410).