Apart from hosting one known parasitic species, no significant ecosystem roles have been suggested or documented in Anoplogaster cornuta. In a small sample of A. cornuta collected near the Grand Banks, southeast of Newfoundland, it was discovered that Tautochondria dolichoura parasitizes them. No other parasites have been reported. Although the nature of its interaction with fangtooths was not studied, T. dolichoura was characterized by synampomorphies that indicated relation to a family of gill parasitizing copepods of Eudactylinidae, Lernanthropidae, and Pseudocyenidae.
- copepods, (Tautochondria dolichoura)