| Family | Common Name | Selected Genus and Species | Image |
| Arhythmacanthidae | Parasitic Worm | Acanthocephaloides irregularis |  |
| Cavisomidae | Parasitic Worm | Cavisoma magnum |  |
| Diplosentidae | Parasitic Worm | Pararhadinorhynchus magnus |  |
| Echinorhynchidae | Parasitic Worm | Echinorhynchus salmonis |  |
| Fessisentidae | Parasitic Worm | Fessisentis acutulus |  |
| Gymnorhadinorhynchidae | Parasitic Worm | Gymnorhadinorhynchus decapteri |  |
| Heteracanthocephalidae | Parasitic Worm | Aspersentis megarhynchus |  |
| Illiosentidae | Parasitic Worm | Telosentis exiguus |  |
| Isthmosacanthidae | Parasitic Worm | Isthmosacanthus fitzroyensis |  |
| Pomphorhynchidae | Parasitic Worm | Pomphorhynchus laevis |  |
| Rhadinorhynchidae | Parasitic Worm | Rhadinorhynchus oligospinosus |  |
| Sauracanthorhynchidae | Parasitic Worm | Sauracanthorhynchus sphenomorphicola |  |
| Transvenidae | Parasitic Worm | Trajectura perinsolens |  |