| Main Ref. | Hutchins, J.B., 1997 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | other |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks | Second uppermost caudal fin ray of male elongate and filamentous. |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Scales on midside of body each with single relatively large, prominently branched spinule (except in some slender males); dorsal profile of snout convex to slightly concave, without prominent hump just anterior to eye; second uppermost caudal fin ray of male elongate and filamentous; dark blotch on side of body below anterior half of soft dorsal fin usually bisected by narrow longitudinal pale line. |
| 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 | 7 - 7 |
| total | 19 - 19 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 2 - 2 |
| Soft-rays total | 26 - 30 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 27 - 30 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 11 - 13 | |
| Pelvics | Attributes largely reduced to one ray |
| Position thoracic behind origin of D1 | |
| Spines | |
| Soft-rays |