| Main Ref. | Allen, G.R. and R. Swainston, 1988 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks |
| Striking features | striking shape of body |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | tube-like |
| Position of mouth | superior |
| Type of scales | |
| Diagnosis |
With a row of bony plates along the midline (absent in F. commersoni); reddish or brownish-orange in color (whereas F. commersoni is greenish-brown). |
| 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 | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 13 - 15 |
| Adipose fin | absent |
| Attributes | other (see diagnosis); with medial filament |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 14 - 15 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 15 - 16 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |