| Main Ref. | Kühlmorgen-Hille, G., 1974 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks | Internally, a dimorphic light organ differientiates between the sexes. Males exhibit greatly enlarged light organ compared to conspecific females of the same length group (Ref. 102051). |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | compressed |
| 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 |
Body silvery. Naked head; with nuchal spine. Mouth strongly oblique; nostrils situated above eyes (Ref. 48635). Protracted mouth pointing upward; Tip of maxilla reaching well below level of lower margin of eye. Body depth twice or slightly more than standard length. Lateral line ending before dorsal fin. |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 48 - 52 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | 23 - 24 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 8 - 8 |
| Soft-rays total | 16 - 16 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 14 - 14 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays 16 - 17 | |
| Pelvics | Attributes more or less normal |
| Position thoracic before origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |