| Main Ref. | Russell, B.C., 1991 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | oval |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | ctenoid scales |
| Diagnosis |
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. |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 47 - 48 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 3 - 3.5 |
| Scale rows below lateral line | 10 - 10 |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | absent |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | 13 - 16 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 10 - 10 |
| Soft-rays total | 9 - 9 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 7 - 7 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 16 - 17 | |
| Pelvics | Attributes more or less normal |
| Position thoracic beneath origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |