| Main Ref. | Tang, L., Y. Zhao and C. Zhang, 2012 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
This species can be distinguished from its congeners by this set of characters: the most elongated body, body depth/SL 8.62-10.68% (vs. 11.70-16.55%); eyeless; caudal fin forked; well-developed adipose crests on caudal peduncle; body naked and de-pigmented. It is similar to O. translucens by lacking eyes and with forked caudal fin, but differs from the latter by the appearance of anterior nostril (long nostril tube and barbel of the anterior nostril, 18.6-26.3% HL) and caudal crests (adipose and not transparent) as well as more counts of vertebrae (4+38-39 vs. 4+32) (Ref. 88136). |
| 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 | 4 - 4 |
| total | 38 - 39 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 9 - 9 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 7 - 7 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 10 - 10 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 6 - 6 |