Siebold's water snake, also known commonly as Siebold's mud snake and Siebold's smooth water snake, is a species of mildly venomous, rear-fanged snake in the family Homalopsidae. The species is endemic to Asia.
The preferred natural habitat of F. sieboldii is freshwater wetlands. ==Description==
Description
F. sieboldii has a dorsal pattern of large blotches similar to those of a python, but it is distinctive in having its nostrils on the top of the snout to aid its aquatic lifestyle. It also lacks labial pits. It may attain a total length (including tail) of . A female of that length had a tail which was long. ==Reproduction==