| Main Ref. | Randall, J.E., 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Lunate caudal fin with elongated lobes in both sexes; upper half of body bluish black and lower half abruptly bluish white, posteriorly with few small black spots; dorsal fin basal half black with pale blue stripe composed of 1 spot per membrane broadly joined to the next ; outer half of fin bluish gray with pale thin blue margin and black submarginal line; caudal fin base and lobes black with pale blue upper and lower margins, centroposterior part of fin transparent with dusky rays; pectoral-fin axil without dark spot. Dorsal rays IV-V (rarely IV), 25-26; pectoral soft rays rarely 13; segmented caudal rays 11-12 (typically 11); lateral line present (Ref. 54980). |
| 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 | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 4 - 5 |
| Soft-rays total | 25 - 26 |
| Adipose fin |
| Attributes |
| Fins number | 1 |
| Spines total | 2 - 2 |
| Soft-rays total | 15 - 16 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 13 - 14 | |
| Pelvics | Attributes more or less normal |
| Position jugular | |
| Spines 1 | |
| Soft-rays 3 - 3 |