| Main Ref. | Karmovskaya, E.S., 1992 |
| 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 |
Edge of unpaired fins dark, pectoral fins light, branchial chamber in the region of the operculum dark. Dorsal fin originates slightly anterior to base of the pectorals. |
| 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 | |
| on upper limb | |
| total | 11 - 12 |
| Vertebrae | |
| preanal | |
| total | 136 - 141 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 173 - 208 |
| Adipose fin | absent |
| Attributes |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 133 - 143 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 14 - 15 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |