| Main Ref. | Jeyaseelan, M.J.P., 1998 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | always different morphology between mature adults |
| Different colors | |
| Remarks | Males possess enlarged 6th and 7th anal fin rays. |
| Striking features | striking type of mouth |
| Body shape lateral | elongated |
| Cross section | oval |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | lower jaw greatly elongated |
| Position of mouth | superior |
| Type of scales | |
| Diagnosis |
Upper jaw distinctly wider than long. Snout uniform brown without any dark band on the midline. Pectoral fin shorter than head length. Lower jaw much shorter than head. Sixth and seventh anal rays of adult males greatly thickened and elongated, both rays reaching beyond the caudal base. Either dorsal ray 4 or 5 or both elongated and thickened. Description: Characterized by greyish color dorsally and silvery white below reddish lower jaw; presence of scales on upper jaw; upper jaw distinctly wider than long, length 1.0-1.2 in width; elongate and pointed nasal papilla, extending well outside of nasal opening (Ref. 90102). |
| 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 | 11 - 14 |
| on upper limb | 4 - 5 |
| total | 15 - 18 |
| Vertebrae | |
| preanal | 28 - 28 |
| total | 42 - 43 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 0 |
| Soft-rays total | 11 - 12 |
| Adipose fin |
| Attributes |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 12 - 13 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 9 - 10 | |
| Pelvics | Attributes |
| Position | |
| Spines 0 | |
| Soft-rays |