| Main Ref. | Collette, B.B., 1999 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosi |
Greatly prolonged, beak-like lower jaw; upper jaw short, triangular and without scales; preorbital ridge absent; total number of gill rakers on first gill arch 33-46; pectoral fins long, reaching beyond anterior margin of nasal pit when folded forward; no spots or vertical bars on sides. |
| 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 | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 24 - 32 |
| on upper limb | 9 - 14 |
| totale | 33 - 46 |
| Vertebre | |
| preanal | 36 - 41 |
| totale | 52 - 57 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 0 |
| Soft-rays total | 12 - 15 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 10 - 13 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 10 - 12 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |