The project focusses on proposing Marine Protected Area (MPA) networks, aiming to achieve the Maximum Sustainable Yield (MSY) objectives of the Common Fisheries Policy (CFP). Within this context, mapping of existing MPAs and Essential Fish Habitats (EFHs) is foreseen, while the development of ECOPATH models in selected MPAs will be considered, using previous and new data, in order to assess the current overall contribution of MPAs in the sustainability of fisheries. Additionally, what-if scenarios of the impact of MPAs on MSY and ECOPATH/ ECOSPACE models will be evaluated and discussed with a wide range of stakeholders in order to propose commonly agreed and more effective MPAs in the study areas. Moreover, different management schemes will be developed and examined in order to support the optimisation of fisheries management.