| Main Ref. | Nakamura, I. and N.V. Parin, 1993 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | striking shape of body |
| Body shape lateral | elongated |
| Cross section | compressed |
| 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 | superior |
| Type of scales | |
| Diagnosis |
Body is elongated and strongly compressed. The mouth is large with fang-like teeth. There are two lateral lines, both originating below the first spine of the dorsal fin. The upper lateral line follows the dorsal contour of the body to the end of the first dorsal fin base. The lower descends gradually posterior to about the tip of the pectoral fin and runs mid-laterally. Body color is uniformly dark brown; all fins dark brown with somewhat darker margins. |
| Ease of Identification |
| Lateral Lines | 2 Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total | 48 - 55 |
| Attributes | extending over most of the back length |
| Fins number | 2 |
| Finlets No. | Dorsal 5 - 6 |
| Ventral 6 - 7 | |
| Spines total | 27 - 33 |
| Soft-rays total | 10 - 14 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 10 - 12 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 12 - 15 | |
| Pelvics | Attributes joint to one spine only |
| Position thoracic behind origin of D1 | |
| Spines 1 | |
| Soft-rays 3 - 4 |