| Main Ref. | Karmovskaya, E.S., 1990 |
| 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 | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Median fins with dark margins; dorsal fin origin above the upper base of the pectoral or slightly anterior; anal fin origin at a point 1.3-1.5 times HL from the gill aperture; lateral line system: supraorbital 3, infraorbital 5, preopercular-mandibular 9, occipital commissure 3 (Ref. 41744). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 34 - 39 |
| 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 | |
| Vertebrae | |
| preanal | |
| total | 151 - 153 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 272 - 324 |
| Adipose fin | absent |
| Attributes |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 198 - 217 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 16 - 18 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |