Ascarophis is a genus of parasitic nematodes, belonging to the family Cystidicolidae.

Species of Ascarophis are parasitic as adults in the gastrointestinal tract of marine and estuarine fishes.

[1][2] According to the World Register of Marine Species,[2] the genus currently (2019) includes many species.

A few are listed here: Several subgenera have been proposed, with the following species: