| Main Ref. | Tan, H.H. and P.K.L. Ng, 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | fusiform / normal |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Differs from other member of the Betta unimaculata group by possessing the following combination of characters: dorsal fin ocellus; body red in color; caudal fin with transverse black and red bands; opercle with large red blotch in mature male; vertebrae 31-32 (mode 32); dorsal-fin rays 9-11 (mode 10); anal-fin rays 25-28 (mode 27); pectoral-fin rays 13-14; lateral scales 32-33 (mode 33); subdorsal scales 6-8 (mode 7); predorsal scales 21-24 (mode 23); predorsal length 62.3-66.7% SL; head length 30.4-33.3% SL; anal-fin base length 43.2-49.2% SL; dorsal-fin base length 12.2-15.7% SL; lower jaw length 38.0-54.0% HL (Ref. 56613). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 32 - 33 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 15 - 17 |
| Scale rows below lateral line | 7 - 11 |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total | 31 - 32 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 1 |
| Soft-rays total | 9 - 11 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | 0 - 1 |
| Soft-rays total | 24 - 27 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 13 - 14 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |