| Main Ref. | Ng, H.H. and Z. Jaafar, 2008 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | compressed |
| Dorsal head profile | clearly concave |
| Type of eyes | more or less normal |
| Type of mouth/snout | clearly protrusible |
| Position of mouth | |
| Type of scales | ctenoid scales |
| Diagnosis |
This species differs from its congeners by its pale bluish-white body color in life (vs. mottled brown); differs from Nandus nandus, the only South Asian congener, in having body depth 24.3-29.1% SL (vs. 28.2-34.3); pelvic fin length 16.2-18.9% SL (vs. 18.0-21.2); from Nandus nebulosus, Nandus oxyrhynchus and Nandus prolixus by the presence (vs. absence) of dark spot on the caudal peduncle, by having lateral line scales 45-52 (vs. 24-37) and body depth 24.3-29.1% SL (vs. 30.7-44.1) (Ref. 75197). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 4 - 6 |
| Scale rows below lateral line | 15 - 17 |
| Scales around caudal peduncle | 18 - 21 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 12 - 14 |
| Soft-rays total | 11 - 14 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | 3 - 3 |
| Soft-rays total | 7 - 8 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 14 - 16 | |
| Pelvics | Attributes |
| Position behind origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 6 |