Characterized by having escal morphology: pair of highly branched medial escal appendages, in combination with an elongate cylindrical lateral escal appendage on each side; well-developed lateral escal appendage; esca with a pair of stout, medial appendages; more globose form, having a deeper and longer head and a longer lower jaw than O.anisacanthus; short subopercle, dorsal end rounded or tapering to a point, without indentation on posterodorsal margin; length of ventral fork of opercle 28.6-31.9% SL; ratio of lengths of dorsal and ventral forks of opercle 0.47-0.53; absence of epibranchial teeth; presence of teeth on pharyngobranchial II; upper jaw teeth 16-55; lower jaw teeth 24-50; teeth on vomer 4-8; dorsal fin rays 5-6; anal fin rays 4; pectoral fin rays 16-18; head length 38.6-64.3% SL; head depth 43.9-50.5% SL; length of premaxilla 30.7-35.5% SL; length of lower jaw 45.5-52.3% SL; illicial length 22.3-27.3% SL (Ref. 86949).