Species: Monolene atrimana, Blackfin flounder, Blackfinned deepwater flounder, Longfinned deepwater flounder

Monolene atrimana Goode & Bean, 1886

Longfinned deepwater flounder, Blackfinned deepwater flounder

Body elongate, tapering to tail; head relatively pointed; snout < eye; eyes on left side; between eyes narrow, with crest that lacks spines; mouth short, ends ~ front edge lower eye; teeth ~equally developed on eye- and blind-sides; gill rakers short and stout, 8; 119-125 dorsal rays; 98-108 anal rays; pectoral fin rays not branched, fin long (longer than head), lowermost rays shortest, 11-15 rays, no pectoral on blind side in adults; base of eye-side pelvic fin equal to base of blind-side fin, situated on body midline, its origin slightly behind that of blind-side fin; about 105 lateral line scales; lateral line on eye side only, strongly arched above the pectoral, no branch under lower eye.