Lower edge of eye touching or just above a line from tip of snout to upper pectoral-fin base; lower edge of suborbital slightly emarginate. Dorsal fin origin about 3-7 scale rows from imaginary line projected upward from posterior edge of suborbital to dorsal profile. Pectoral and pelvic fins long, reaching to or just short of level of anal-fin origin. Closely resembles N. bathybius Snyder, but has no yellow stripe on either side of the ventral midline and the upper tip of the caudal fin not drawn into a distinct filament. Axillary scale present. Color: Upper part pinkish, silvery below.