| Main Ref. | Gill, A.C. and U. Zajonz, 2003 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | eel-like |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis | |
| 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 | 5 - 6 |
| on upper limb | 2 - 3 |
| total | |
| Vertebrae | |
| preanal | |
| total | 69 - 73 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 64 - 68 |
| Adipose fin |
| Attributes | confluent |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 52 - 55 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 9 - 12 | |
| Pelvics | Attributes suppressed/absent |
| Position | |
| Spines 0 | |
| Soft-rays 0 - 0 |