This work examines the creation of EBSAs in the CBD documents; defines the international, regional and European framework; moves to two examples of implementation in the Adriatic Sea as a value added to the process of European integration and in the Alborán Sea as a value added to the policies of North-South cooperation; finally, in its conclusions demonstrates the strategic importance of this new figure of protection for the future global marine conservation policies. It is divided into 6 Chapters and final Recommendations; 35 Boxes that highlight the most important steps of the analysis; 5 Figures; 17 Maps, 15 Tables.