Number of transverse rows of scales 8. Predorsal scales 6. Scales on cheek 3 rows and on opercle 3-4 rows. Head depressed. Mouth small and oblique. Maxillae extend to below anterior nostril, which is midway between the snout tip and the eye. Both nostrils in tubes. Many papillated flaps on head. Very close eyes; interorbital space very narrow, about 1/4 of eye diameter, with 2 median pores. Restricted gill opening. Rounded tongue. Pelvic fins without fraenum, united only at their bases with a delicate membrane. Caudal fin shorter than head. Cycloid scales on breast, pre-pelvic, and predorsal regions, opercle and cheek (Ref. 47607).