Main Ref. | Hart, J.L., 1973 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | |
Different colors | |
Remarks |
Striking features | |
Body shape lateral | eel-like |
Cross section | |
Dorsal head profile | |
Type of eyes | |
Type of mouth/snout | |
Position of mouth | |
Type of scales | |
Diagnosis |
First 5 rays of dorsal fin greatly elongated in young becoming reduced with age, otherwise rather higher in center, extending almost to caudal and ends abruptly (Ref. 6885); caudal fin highly asymmetric, dorsal lobe becomes well developed in juveniles with 7-8 rays directed upward at an angle of 45° to body axis, and eventually with growth is much reduced; ventral lobe elongate in young specimens becoming reduced to 5-6 spines directed backward from the caudal base in older individuals; anal fin absent; pectorals small, rounded; pelvic fins elongate in young and juveniles, reduced to base in larger individuals (Ref. 6885). Juveniles iridescent silvery with a series of about 4 dark blotches spaced above lateral line canal; upright and pelvic fins carmine red; larger individuals rather very silvery and greener with light spots, around scales; posterior end of dorsal fin darker (Ref. 6885). |
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 | 9 - 11 |
on upper limb | 3 - 5 |
total | 12 - 16 |
Vertebrae | |
preanal | |
total | 90 - 94 |
Attributes | extending over most of the back length |
Fins number | 1 |
Finlets No. | Dorsal 0 - 0 |
Ventral 0 - 0 | |
Spines total | 0 - 0 |
Soft-rays total | 165 - 184 |
Adipose fin | absent |
Attributes | other (see remark); asymmetric |
Fins number | |
Spines total | 0 - 0 |
Soft-rays total | 0 - 0 |
Pectoral | Attributes more or less normal |
Spines 0 | |
Soft-rays 10 - 11 | |
Pelvics | Attributes other (see diagnosis) |
Position thoracic | |
Spines 0 | |
Soft-rays 6 - 7 |