| Main Ref. | Kuo, C.-H., S.-C. Lee and H.-K. Mok, 2010 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | eel-like |
| Cross section | circular |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Branchial slime spores and the gill apertures arranged in a straight line; distances from a branchial slime pore to its immediately preceding and posterior gill apertures similar; the ventral aorta not bifurcated. The body color is pink. 5 gill apertures, not crowded; the presence of a pair of small nasal papillae on the roof of the nasal tube; a robust body; 100-102 total slime pores (prebranchial 16 or 17, branchial 3 or 4, trunk 62, tail 19); 3 multicusps in outer row, 7 unicusps, 2 multicusps in inner row, 7 unicusps; eyespot absent. |
| Ease of Identification | easy to distinguish from other 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 | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 0 - 0 |
| Adipose fin | absent |
| Attributes |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 0 - 0 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 0 - 0 | |
| Pelvics | Attributes |
| Position | |
| Spines 0 | |
| Soft-rays 0 - 0 |