| Main Ref. | Anderson, M.E. and H. Imamura, 2002 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | eel-like |
| Cross section | compressed |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
Pelvic fins absent. Palatine teeth in 2 irregular rows anteriorly. Suborbital pores 5, emanating from lower ramus of bone chain. Postorbital pores 5. Head pores small, rounded (Ref. 45048). |
| Ease of Identification |
| Lateral Lines | 2 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 | 10 - 12 |
| on upper limb | 3 - 3 |
| total | 13 - 15 |
| Vertebrae | |
| preanal | |
| total | 116 - 119 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 0 |
| Soft-rays total | 111 - 114 |
| Adipose fin |
| Attributes | pointed; with dorsal and ventral filament |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 93 - 94 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes other (see remarks) |
| Position | |
| Spines | |
| Soft-rays |