| Main Ref. | Kullander, S.O. and R. Britz, 2002 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | fusiform / normal |
| Cross section | compressed |
| Dorsal head profile | clearly convex |
| Type of eyes | more or less normal |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Body extremely slender, body depth 26.3-32.7% SL. Dentary pores 1-2; infraorbital pores 1-2; lachrymal pores 2; extrascapular pore 1. Caudal fin base with a prominent dark spot at the center, surrounded by a light ring. Differs from B. corycaeus in having a slender body, depth (versus 32.5-39.4%SL); more lateral line scales, 27-28 (versus 25-26); more vertebrae, 28-29 (versus 26-29); and color pattern where males are overall light with scattered black spots on each scale on sides. No dark blotch on cleithrum, opercular margin, nor on dorsolateral side of caudal peduncle (Ref. 46238). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 27 - 28 |
| 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 | 5 - 7 |
| Vertebrae | |
| preanal | |
| total | 28 - 29 |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 16 - 17 |
| Soft-rays total | 9 - 10 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 6 - 8 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 11 - 13 | |
| Pelvics | Attributes more or less normal |
| Position thoracic behind origin of D1 | |
| Spines | |
| Soft-rays |