| Main Ref. | Nishiguchi, Y., T. Miwa, S. Kubota, M. Taru and M. Okada, 2009 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | |
| Cross section | circular |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnose |
Pectoral fin absent. Pelvic fin absent. Fused right and left gill membranes fused, forming dermal fold across isthmus; dorsal fin without notch near its tail end; eyes located close to each other; convex interorbital space; no palatine teeth. |
| Ease of Identification | likely to be confused with closely related species. |
| 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 | |
| insgesamt | |
| Wirbelzahl | |
| preanal | 27 - 83 |
| insgesamt | 110 - 110 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 101 |
| Adipose fin | absent |
| Attributes |
| Fins number | 1 |
| Spines total | |
| Soft-rays total | 88 |
| Pectoral | Attributes absent |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes suppressed/absent |
| Position | |
| Spines | |
| Soft-rays |