Salmon jumping inside circular cages at salmon farm inside a Norwegian fjord - Birdseye aerial above cages moving slowly sideways

salmon farm farmed salmon breeding industrial healthy norway sea above aerial oily cage unhealthy lice sickness export resource sustainability establishing trout surface aquafarm structure food industry aquatic net coast nature development ocean fish farm commercial water circle industry floating seafood business produce aquaculture fishery medicine feeding expensive sick fish unethical feeding tube food