| Main Ref. | Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Soft, watery body; eyes small; anterior nostril swollen; no spines on opercle and preopercle; preopercle posteriorly expanded; 10-12 developed rakers on anterior gill arch (Ref. 34024). Anal fin rays 111 in Ref. 40708. Distance of pelvic fin base to anal fin base is 27% SL (Ref. 40708). |
| 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 | 50 - 50 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 116 - 116 |
| Adipose fin | absent |
| Attributes |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 98 - 98 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 25 - 28 | |
| Pelvics | Attributes largely reduced to one ray |
| Position | |
| Spines 0 | |
| Soft-rays 1 - 1 |