Round Norwegian marine pen on aquafarm with jumping salmon

norwegian marine pen aquafarm aquaculture jumping salmon round salmon farm norway seafood pisciculture fish jump aquafarming norway aquaculture fish farm breaking the surface stocked salmon farming atlantic salmon controversy controversial marine pens fishery farming salmo salar sustainability food production commercial salmonidae industry sustainable scandinavia cage marine ocean oceanfarmed atlantic arctic circle enclosed farmedsalmon production aquatic aerial drone antibiotics ammonia intensive pen fish mortality rate