| Main Ref. | Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Dorsal fin of males (larger than about 21 cm FL) with 3 central rays produced into filaments of variable length. (Ref. 90102) |
| Striking features | striking fins |
| 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 | |
| Diagnosis |
Description: Bluish grey dorsally, shading to silvery on side, with blackish blotch on upper rear margin of the opercle (Ref. 90102). Body strongly compressed and deep; head profile very deep in adult (Ref. 48635, Ref. 90102). Snout sub equal to eye in length (Ref. 559). Breast scaleless ventrally to behind origin of pelvic fins. LL scutes 11-24, weak; total elements 25-43. Anterior lobes of first dorsal and anal fins elongate with growth. Dorsal fin of males (larger than about 21 cm FL) with 3 central rays produced into filaments of variable length (Ref. 90102). |
| 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 | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 19 - 21 |
| on upper limb | 8 - 9 |
| total | 27 - 20 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | first fin ray very elongated |
| Fins number | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 9 - 9 |
| Soft-rays total | 19 - 22 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 2 |
| Spines total | 3 - 3 |
| Soft-rays total | 16 - 18 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal beneath origin of D1 | |
| Spines | |
| Soft-rays |