6b514bce_ter_Fish___Minnesota_Sea_Grant__Symptom
[Parasite] ANCHORWORM (Lernaea spp.) [Type] copepod [Description] 1/8 to 1 inch; buries anchor-shaped head into fish. Body protrudes; inflamed pustule may form. Parasite may drop off, leaving inflamed area. [Edible] Yes [Recommendation] Cut out inflamed area; clean fish and prepare as usual [Symptom] 
Red pustule on or near base of fins; thread-like body may protrude from wound
Parasites of Freshwater Fish | Minnesota Sea Grant
Symptom