Thamnosophis stumpffi, commonly known as the yellow-striped water snake, is a species of snake in the subfamily Pseudoxyrhophiinae of the family Pseudoxyrhophiidae.

The specific name, stumpffi, is in honor of Anton Stumpff who collected the holotype.

[3] T. stumpffi is found in northwestern Madagascar, including the island Nosy Be.

[1][2] The preferred natural habitat of T. stumpffi is forest.

This Alethinophidia article is a stub.