Can be diagnosed by having the following characters: dorsal fin with 56-60 rays; caudal fin with 17-19 rays; dorsal and anal fins joined to caudal fin only near its base; caudal-fin outline entirely separated from that of dorsal and anal fins; body sides lacking marbling, hexagonal meshes, or irregular dark brown blotches except with 14-15 dark blotches on its back; abdomen grey without a line or hexagonal meshes; and head length less than 3.5 times of head width and 2.8 times of snout length (Ref. 86860).