| Main Ref. | Ng, H.H. and M. Kottelat, 2000 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | circular |
| Dorsal head profile | more or less straight |
| Type of eyes | other (see remarks) |
| Type of mouth/snout | other (see remarks) |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
Presence of 4-5 serrations along posterior edge of pectoral spine; iii-iv,7-8 anal-fin rays (total 10-11), and a more deeply forked caudal fin with regularly tapering lobes. Differs further from other Indochinese congeners in possessing fewer vertebrae (34-36 vs. 38-41); a deeper body (depth at anus 15.2-16.9% SL vs. 9.8-15.1) and equal upper and lower jaws (vs. longer and weakly-projecting lower jaw) (Ref. 37785). |
| 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 | 9 - 11 |
| Vertebrae | |
| preanal | |
| total | 34 - 36 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 6 - 7 |
| Adipose fin |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 10 - 11 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays 6 - 7 | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |