An empty Tuna cage in the Mediterranean Sea north of Lybia with the Rainbow Warrior in the background. Greenpeace is calling in the countries of the Mediterranean Sea to protect Bluefin Tuna with Marine Reserves in their breeding and feeding areas. This would be part of a global network of Marine Reserves across 40% of the world's oceans that are needed to give the Oceans a chance to recover from decades of large-scale industrial exploitation.