Can be diagnosed by the possession of the following characters: dorsal fin with 64-67 rays; anal fin with 63-66 rays and caudal fin with 18 rays; dorsal, anal and caudal fins almost entirely joined, but with distinct notches among dorsal-fin, anal-fin and caudal-fin outline; body sides and back dark brown with 4-5 zigzag longitudinal lines and forming a network from front of anal-fin origin to caudal-fin base; presence of a longitudinal brown line from the isthmus to anus on the abdomen or sometimes the line becoming network (Ref. 86860).