| Main Ref. | Hart, J.L., 1973 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Dorsal and anal fins extending to about halfway along caudal; caudal fin narrow, truncate; middle rays of pectorals short, lower rays much exserted; pelvic fins modified a adhesive disc with a thickened margin, small slightly wider than long (Ref. 6885). Creamy white to pale pink, sometimes pale brown dorsally; dusky on fins; silvery on lower half of blue eyes (Ref. 6885). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 0 - 0 |
| 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 |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 55 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 46 - 48 |
| Pectoral | Attributes rays very elongated |
| Spines 0 | |
| Soft-rays 31 | |
| Pelvics | Attributes part of sucker-disc |
| Position before origin of D1 | |
| Spines 0 | |
| Soft-rays 0 - 0 |