| Main Ref. | Smith, C.L., 1997 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Diagnosis |
Dorsal and anal fins have very long, dark anterior lobes (Ref. 26938). No scutes; a broad patch of orange-yellow on abdomen in front of anal fin; pectoral fins blackish (Ref. 13442). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 135 - 135 |
| 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 | 9 - 15 |
| on upper limb | 3 - 9 |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 6 - 7 |
| Soft-rays total | 18 - 21 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | 2 - 3 |
| Soft-rays total | 16 - 18 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 17 - 20 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |