6b514bce_ter_Fish___Minnesota_Sea_Grant__Symptom
[Parasite] Ergasilus spp. [Type] copepod [Description] When numerous, can kill young fish. Presence indicated by V-shaped white egg sacs on inner edges of gills. [Edible] Yes [Recommendation] Clean fish and prepare as usual [Symptom] 
White, cream, or yellow cysts or sacs on gills or in mouth
Parasites of Freshwater Fish | Minnesota Sea Grant
Symptom