| 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 |
Posterior edge of adipose fin rounded; length of adipose fin base 23.3-27.9% SL (versus 19.9-22.8 in A. variegatum); depth of caudal peduncle 13.2-15.9% SL; body depth at anus 11.2-14.2% SL; eyes small, dorsolaterally situated and subcutaneous, diameter 5.5-8.5% HL.
Description: 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 - 9 |
| Vertebrae | |
| preanal | |
| total | 38 - 41 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 6 - 6 |
| Adipose fin | present |
| Attributes | forked; asymmetric |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 12 - 15 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays 7 - 8 | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |