acanthocephalan

Any of parasitic intestinal worms comprising the phylum Acanthocephala.

That discussion of fish intestines is justified because many acanthocephalans have been described from fish.

2006, B. B. Nickol, Phylum Acanthocephala, P. T. K. Woo (editor), Fish Diseases and Disorders, Volume 1: Protozoan and Metazoan Infections, 2nd Edition, page 458, Clearly acanthocephalans contain large amounts of lipid and possess enzyme systems for lipid metabolism (Filipponi et al., 1994; Weber et al., 1995); however, use of these lipid deposits in energy metabolism is yet to be demonstrated.

In a manner similar to Acanthocephala.