| Main Ref. | Bagnis, R., P. Mazellier, J. Bennett and E. Christian, 1972 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| 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 | terminal |
| Type of scales | |
| Diagnosis |
The only jack without scutella on the caudal peduncle. Dark blue dorsally and almost white ventrally; with a well defined line of demarcation between the two colors. |
| Ease of Identification |
| Lateral Lines | 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 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 5 - 6 |
| Soft-rays total | 33 - 35 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 2 |
| Spines total | 2 - 3 |
| Soft-rays total | 20 - 21 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position thoracic beneath origin of D1 | |
| Spines | |
| Soft-rays |