| Main Ref. | Tan, H.H. and P.K.L. Ng, 2006 |
| 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 |
Distinguished from Betta dimidiata (the only other member of the B. dimidiata group) in having the following combination of characters: iridescent turquoise opercle scales when live ( vs. gold); yellowish-brown body when live (vs. reddish); yellowish fins when live (vs. reddish); rounded caudal fin (vs. lanceolate); more lateral scales (30-32, vs. 29-30); more predorsal scales (20-21, vs. 17-18); deeper caudal peduncle (15.3-17.0% SL, vs. 11.8-14.5) (Ref. 57022). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 30 - 32 |
| 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 | |
| Vertebrae | |
| preanal | |
| total | 29 - 31 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 2 |
| Soft-rays total | 6 - 8 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | 2 - 3 |
| Soft-rays total | 19 - 22 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 12 - 12 | |
| Pelvics | Attributes |
| Position before origin of D1 | |
| Spines 1 | |
| Soft-rays |