| Main Ref. | Hulley, P.A., 1986 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | light organs |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Branchiostegal rays: 8-9 (Ref. 31442). Anal organs 14-15; males with single supracaudal gland filling about 1/2 the supracaudal space, females with 3 coalesced infracaudal gland patches, sometimes separate (Ref. 39633). |
| 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 | 13 - 15 |
| on upper limb | 4 - 5 |
| total | 17 |
| Vertebrae | |
| preanal | |
| total | 38 - 40 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 13 - 15 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 21 - 25 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 13 - 15 | |
| Pelvics | Attributes |
| Position | |
| Spines 0 | |
| Soft-rays 8 - 8 |