| Main Ref. | Collette, B.B., 1999 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Greatly prolonged, beak-like lower jaw, equal to, or longer than head length; upper jaw short, triangular and scaly, its width 0.6-0.8 times in its length. Preorbital distance 1.3-2.1 times in diameter of orbit and 0.75-1.2 times in length of upper jaw. Total number of gill rakers on first gill arch 23-37. Anal fin rays 13-16; caudal fin emarginate, not strongly forked. |
| 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 | 19 - 23 |
| on upper limb | 6 - 11 |
| total | 23 - 37 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 0 |
| Soft-rays total | 13 - 16 |
| Adipose fin |
| Attributes | other (see remark) |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 13 - 16 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 10 - 12 | |
| Pelvics | Attributes |
| Position | |
| Spines 0 | |
| Soft-rays |