| Main Ref. | Whitehead, P.J.P., G.J. Nelson and T. Wongratana, 1988 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks |
| Striking features | striking fins |
| Body shape lateral | elongated |
| 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 | sub-terminal/inferior |
| Type of scales | cycloid scales |
| Diagnosis |
Body tapering, belly rounded in front of pelvic fins, with 11 or 12 + 9 to 11 = 20 to 23 keeled scutes from isthmus to anus. Maxilla short, not reaching beyond edge of gill cover. Pectoral fin with 10 or 11 long filaments and 7 or 8 branched fin rays, much shorter than those of pelvic fin. |
| 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 | 0 - 0 |
| Scale rows below lateral line | 0 - 0 |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 31 - 33 |
| 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 | |
| Adipose fin | absent |
| Attributes | pointed |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 80 |
| Pectoral | Attributes rays very elongated |
| Spines 0 | |
| Soft-rays 17 - 19 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines 0 | |
| Soft-rays 7 - 7 |