| Main Ref. | Yamanoue, Y. and K. Matsuura, 2003 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
This species is distinguished from its congeners by the following set of characters: basioccipital foramen present (vs. absent); proximal middle radial of anal-fin pterygiophore slender with trough on anterodorsal portion (vs. no trough); lateral line scales 36-42 (vs. 44-48 in N. atlanticus, 47-51 in N. pacificus); only cycloid scales on body (vs. ctenoid and cycloid in N. atlanticus); small canine teeth on side of lower jaw (vs. villiform teeth in N. atlanticus) (Ref. 55728). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 37 - 42 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 14 - 17 |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 10 - 10 |
| Soft-rays total | 10 - 10 |
| Adipose fin | absent |
| Attributes |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 7 - 8 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 15 - 17 | |
| Pelvics | Attributes |
| Position | |
| Spines 1 | |
| Soft-rays 5 - 5 |