| Main Ref. | Herre, A.W.C.T., 1927 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | different shape of head (f,m) |
| Different appearance | always different morphology between mature adults |
| Different colors | males alike females |
| Remarks | Males are larger with bulldog like head. Genital organs are likewise larger than females (Ref. 29019). Anal papilla of females is short and thick while that of males is threadlike and pointed (Ref. 439). |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | |
| Type of scales | scales embedded or partly/completely absent |
| Diagnosis |
Adults are transparent or yellowish in color (Ref. 13460). A few black specks on snout and chin present in some specimen, others have specks scattered over back of head and a row along the base of anal fin (Ref. 439). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| 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 |
| Attributes | no striking attributes |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 4 - 5 |
| Soft-rays total | 1 - 7 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 1 - 2 |
| Soft-rays total | 9 - 8 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position | |
| Spines | |
| Soft-rays |