| Main Ref. | Paugy, D. and S.A. Schaefer, 2007 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | always different morphology between mature adults |
| Different colors | |
| Remarks | Pronounced sexual dimorphism affecting the shape of the anal fin. |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | cycloid scales |
| Diagnosis |
Diagnosis: very well developed adipose eyelid (Ref. 42019, 80290, 81279); 18-20 branched anal-fin rays (Ref. 2880, 42019, 80290, 81279). 16-20 branched rays in Tanganyika specimens (Ref. 36899, 45485). 17-22 gill rakers on lower limb of first gill arch; dorsal-fin origin at about same level of pelvic-fin insertions (Ref. 2880, 80290, 81279). Sexual dimorphism affecting shape of anal fin (Ref. 80290, 81279). Description: well developed fontanel (Ref. 2880). Anal fin: III, 18-20 (Ref. 2880, 42019, 80290, 81279) or III, 16-20 (Ref. 36899, 45485). Dorsal fin: II, 8 (Ref. 2970) or III,8 (Ref. 36901). Coloration: silvery body, back darker bluish or greenish, lower sides and ventral part white; pectorals and ventrals sometimes blackish (Ref. 2880, 80290, 81279). |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 36 - 46 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 6.5 - 7.5 |
| Scale rows below lateral line | 3.5 - 3.5 |
| Scales around caudal peduncle | 12 - 12 |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 17 - 22 |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 10 - 11 |
| Adipose fin | present |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 19 - 23 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines | |
| Soft-rays |