The third international seminar on advanced lessons in economics from fisheries and aquaculture was held in Santiago de Compostela, Spain, from July 6-10, 2015, attracting 36 speakers from 22 countries and over a hundred participants. The event focused on the challenges facing both fisheries and aquaculture, emphasizing the need for collaboration between the industry and government, while presenting various innovative strategies to enhance productivity and sustainability in these sectors. Key discussions included the importance of aquaculture in food production, the competitive dynamics between wild and farmed fish, and the economic sustainability of the EU seafood industry.