| Main Ref. | Trewavas, E., 1983 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | always different morphology between mature adults |
| Different colors | different colors during breeding season only |
| Remarks |
| Striking features | none |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | clearly concave |
| 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 |
Scales on cheek in 2-3 series. Breeding males with flanks silver-grey, with yellow on the outer edges of the scales; 7-9 dark vertical bars which are not always visible and quickly lost on removal from the water; lower lip yellow. Females with flanks yellowish silver with faint vertical bars and no lateral spots; lower lip white. |
| Ease of Identification |
| Lateral Lines | 2 Interrupted: No |
| Scales on lateral line | 30 - 32 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 4 - 5 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | absent |
| Gill rakers | |
| on lower limb | 15 - 19 |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total | 29 - 31 |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal 0 |
| Ventral 0 | |
| Spines total | 17 - 19 |
| Soft-rays total | 9 - 12 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 5 - 5 |
| Soft-rays total | 9 - 10 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position thoracic beneath origin of D1 | |
| Spines | |
| Soft-rays |