Veterinarian on salmon fish farm inspecting fish for signs of parasites on skin

sea lice outbreaks ectoparasites ectoparasitic copepods marine ectoparasites sea lice pisciculture chemical sea louse fish skin protective gear lesions salmon farmers salmon production copepod farmedsalmon production fish farming inspect lepeophtheirus salmonis aquaculture field monitoring salmon farm parasites oceanfarmed fish farm aquatic aquafarm fish vet crustaceans infestation health concern fishery industry commercial salmon scandinavia mortality veterinarian norwegian sustainability fishing industry problem food production scandinavian seafood health treatment threats norway