| Main Ref. | Allen, G.R., R.K. Hadiaty, P.J. Unmack and M.V. Erdmann, 2015 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | fusiform / normal |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | terminal |
| Type of scales | cycloid scales |
| Diagnosis |
Melanotaenia aruensis is distinguished by the following combination of characters: V to VII-I,10-13 dorsal-fin rays; I,20-23 anal-fin rays; 14-15 pectoral-fin rays; 34-36 scales on lateral line, 15-18 predorsal scales; 13-19 cheek scales; 17-18 total gill rakers on first arch; greatest body depth of adult male 35.1 % SL; least depth of caudal peduncle 9.5-11.1 % SL; colour in life grey-brown dorsally on head, nape, and adjacent anterodorsal portion of body; posterior two-thirds of upper half of body bluish grey with narrow bronze margin around each scale and bronze stripe between each horizontal scale row; dorsal and caudal fins semitranslucent grey, second dorsal fin with relatively broad whitish margin (Ref. 110723). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 34 - 36 |
| 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 | 17 - 18 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 5 - 7 |
| Soft-rays total | 10 - 13 |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | 1 - 1 |
| Soft-rays total | 20 - 23 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 14 - 15 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |