| Main Ref. | Cohen, D.M., 1984 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks |
| Striking features | striking eyes |
| Body shape lateral (shape guide) | elongated |
| Cross section | |
| Dorsal head profile | clearly convex |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
More than two eyes; anal fin base longer than caudal peduncle; swim bladder absent; branchiostegal rays, two on each side; pectoral fins originating close to ventral surface of the body. Head and body black when fresh; scale pocket markings jet black (Ref. 13608). Branchiostegal rays: 2 (Ref. 35604). Also Ref. 41299. |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 50 - 52 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 2 - 2 |
| Scale rows below lateral line | 2 - 2 |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | absent |
| Gill rakers | |
| on lower limb | 16 - 18 |
| on upper limb | 5 - 9 |
| total | 21 - 27 |
| Vertebrae | |
| preanal | |
| total | 48 - 54 |
| Attributes | other |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 9 - 12 |
| Adipose fin | present |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 18 - 23 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 9 - 12 | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines 0 | |
| Soft-rays 9 - 11 |