also known as: Proteocephalus ambloplites, bass tapeworm
Proteocephalus is a common tapeworm in warmwater fishes in Oregon. It is most often seen as plerocercoid stages (pale cysts) on the gut and other internal organs. Migration of the plerocercoid stages through the fish organs can make the fish sterile or otherwise unhealthy. Adult Proteocephalus tapeworms adhere to the inner surface of the gut and shed eggs with the fish feces.