| Main Ref. | Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | short and / or deep |
| Cross section | compressed |
| Dorsal head profile | clearly concave |
| Type of eyes | more or less normal |
| Type of mouth/snout | tube-like |
| Position of mouth | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Dorsal contour of head with a deep concavity. Snout protruding upward. Mouth rather large, 2.6 to 2.7 times in head length; maxillary extending slightly beyond anterior margin of lower eye. Eyes very small, diameter contained .3 to 4.7 times in head length. |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 85 - 110 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 8 - 8 |
| on upper limb | 5 - 6 |
| total | 13 - 16 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 108 - 110 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 83 - 87 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 14 - 15 | |
| Pelvics | Attributes more or less normal |
| Position jugular behind origin of D1 | |
| Spines | |
| Soft-rays |