Those who advocate moving all salmon farms from the ocean onto land need to realize that although land-based technology is evolving, the practice of growing salmon in tanks poses very real challenges. To grow salmon to market size and meet the global demand would require massive amounts of land, water and energy. And most importantly there are animal welfare considerations. It would take billions of litres of water just to fill the tanks and billions of litres of even more fresh water to flush the fish for 10-15 days prior to harvest as is necessary when they are grown to full size in land-based tanks. Our salmon farmers are experts in closed containment because their fish spend more than half their lives in land-based hatcheries where recirculation systems are used. They know that technology continues to evolve (they are the ones driving that innovation!), but at this point, the ocean is the best place for salmon to grow from smolts to market size – just as they do in nature.