6b514bce_ter_Fish___Minnesota_Sea_Grant__Symptom
[Parasite] Camallanus spp. [Type] roundworm [Description] Found throughout intestine. Occasionally species living in lower large intestine extends from anus. [Edible] Yes [Recommendation] Clean fish and prepare as usual [Symptom] 
Red thread-like worms extending from anus
Parasites of Freshwater Fish | Minnesota Sea Grant
Symptom