| Main Ref. | Gill, A.C., R.D. Mooi and J.B. Hutchins, 2000 |
| 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 |
Dorsal fin rays usually I,59 or I,60; anal fin rays usually 48 or 49; dark spot on operculum, none on shoulder; gill membranes fused ventrally with posterior margin free from isthmus; lateral line single, short anterodorsal section; teeth in outer row of dentary and premaxilla 14-21; and cheek with short dark bar extending from posteroventral edge of eye towards lower tip of preopercle (Ref. 42960). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 26 - 35 |
| 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 - 12 |
| on upper limb | 1 - 4 |
| total | 10 - 16 |
| Vertebrae | |
| preanal | |
| total | 63 - 65 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 1 - 1 |
| Soft-rays total | 57 - 61 |
| Adipose fin | absent |
| Attributes | confluent |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 47 - 50 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 10 - 11 | |
| Pelvics | Attributes suppressed/absent |
| Position | |
| Spines 0 | |
| Soft-rays 0 - 0 |