6b514bce_ter_Fish___Minnesota_Sea_Grant__Symptom
[Parasite] Philometra spp. [Type] roundworm [Description] Typically infests carp, buffalo, and suckers; lives just under skin. [Edible] Yes [Recommendation] Clean fish and prepare as usual [Symptom] 
White to pink thread-like swelling on head or fins
Parasites of Freshwater Fish | Minnesota Sea Grant
Symptom