| 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 | oval |
| 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 |
Length of adipose fin base 14.6-15.8% SL (versus 18.5-33.5 in other Indochinese species); body depth at anus 9.8-10.7% SL (versus 11.2-16.9 in other Indochinese species); eyes small, dorsolaterally situated and subcutaneous, diameter 2-3.4% HL (versus 4.3-8.5 in other Indochinese species). Caudal fin lobes somewhat rounded posteriorly, with the upper lobe longer than lower. Mouth and gape terminal with lower jaw slightly longer than upper and weakly projecting forwards; lips fleshy and slightly fimbriated, with well-developed rictal fold below anterior border of eye, consisting of large and membranous upper lobe joined at corner of mouth with lower lobe (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 | 8 - 13 |
| Vertebrae | |
| preanal | |
| total | 40 - 41 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 6 - 7 |
| Adipose fin | present |
| Attributes | forked; asymmetric |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 14 - 15 |
| 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 |