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

Species of Ascarophisnema are parasitic as adults in the gastrointestinal tract of fish.

[2] The generic name consists of two parts, Ascarophis (the name of a similar genus) and nema (= nematode).

[1] Ascarophisnema tridentatum Moravec & Justine, 2010[1] is a parasite of the stomach of the fish Gymnocranius euanus (Lethrinidae, Perciformes) in the coral reef lagoon of New Caledonia.

It has also been recorded from the stomach of the fish Gymnocranius grandoculis in the same locality.