VALIAS aims to match the need for managing the marine Invasive Alien Species (IAS) populations with the growing demand for marine derived-products. Under the frame of circular economy, the valorization of unexploited IAS feedstocks can represent a sustainable strategy for the realization of a circular bio-economy, with the production of stable and safe food, fish feed and cosmetic ingredients. Various compounds with high commercial value obtained from fish and other invasive aquatic species byproducts, including collagen, enzymes, bioactive peptides, minerals and functional fatty acids will be valorized in VALIAS. VALIAS proposal can turn the current problem represented by marine IAS into a "WinWin" solution both for the European fisheries and for the companies active in the sector of aquaculture, nutrition and cosmetology. Specifically, VALIAS will contribute to the limitation of IAS stocks and of their negative ecological and economic impact on marine life, fisheries, human welfare, and health in European seas. Finally, VALIAS will contribute to the enrichment of the knowledge of the biology of IAS, a key objective of European Directive 1143/2014 on the prevention and management of introduction and spread of alien species. VALIAS will bring together experts from industry and academia specialized in interdisciplinary/inter-sectorial, yet highly complementary, research areas of Marine-Maritime Research, Aquaculture, Feed-Food technology and safety and Cosmetology. As a joint research and innovation project, it will develop a strong partnership involving 8 partners from 5 EU countries (EL, CY, IT, IE and BG) and with different technical backgrounds from the academic and non-academic sectors. The execution of the project and the knowledge sharing will be based on secondments (exchanges) of research and innovation staff with an in-built return mechanism strengthening collaborative research among the different countries and sectors.