| Main Ref. | Fischer, W. and P.J.P. Whitehead (eds.), 1974 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| 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 | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Head profile concave at nape. Head shield strongly rugose and granulated; supra-occipital process short, about as long as broad, with median keel, hind end concave. Dorsal and pectoral fins with very strong, thick, and coarsely granulated spine; tip of dorsal spine produced into a long filament; adipose fin rather large. Body with metallic blue luster. Tip of dorsal fin blackish, its filament black; pectoral, pelvic and anal fins dusky; caudal fin paler; adipose fin either entirely black or bearing a large black blotch on upper half. |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 0 - 0 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 0 - 0 |
| Scale rows below lateral line | 0 - 0 |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 7 - 7 |
| Adipose fin | present |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 16 - 30 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |