| Picture Used | Pyven_u0.jpg |
| Size (cm) | 19.7 TL |
| Sex | unsexed |
| Locality | |
| Total length (TL) | 562 pixels |
| Standard length | 96.8 % TL |
| Fork length | 100.0 % TL |
| Pre-anal length | 19.9 % TL |
| Pre-dorsal length | 14.8 % TL |
| Pre-pelvic length | 13.9 % TL |
| Pre-pectoral length | 18.9 % TL |
| Body depth | 14.8 % TL |
| Head length (HL) | 17.3 % TL |
| Eye diameter | 14.4 % HL |
| Pre-orbital length | 17.5 % HL |
| Aspect ratio of caudal fin | |
| Remarks | Body eel-like; dorsal and anal fins begin at or near head and extend to tip of tail; caudal fin rudimentary or absent |
