This species is distinguished by the following characters: a membrane joining dorsal and anal fins with the caudal fin; the anus is closer to anal fin than to disc, about two-thirds the distance from the rear margin of the disc to the origin of anal fin; upper attachment of gill membrane opposite ninth pectoral-fin ray; second gill arch with 8 rakers; postdorsal-caudal distance 6.4-7.3 in dorsal-fin length; D 15-16; A 13; pectoral-fin rays 26-28 (rarely 28); principle caudal-fin rays 12; total caudal-fin rays 20 (Ref. 103877).