| Main Ref. | Murdy, E.O. and K. Shibukawa, 2001 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | scales embedded or partly/completely absent |
| Diagnosis |
Eyes rudimentary but distinct, covered by skin. Mouth oblique. Several short barbels may be present on underside of chin. Pectoral -fin rays free and silk-like. Three anal fin pterygiophores preceding first haemal spine. Cycloid scales embedded on head and body. Caudal fin very long (Ref. 45323). |
| 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 | |
| Vertebrae | |
| preanal | 10 - 10 |
| total | 27 - 27 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 6 - 6 |
| Soft-rays total | 34 - 41 |
| Adipose fin |
| Attributes | pointed; more or less normal |
| Fins number | 1 |
| Spines total | 1 - 1 |
| Soft-rays total | 32 - 39 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 25 - 33 | |
| Pelvics | Attributes joint, cup-like |
| Position thoracic before origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |