MadeInSea is a Portuguese company dedicated to the development of high-quality marine products based on innovation and in the sustainable use of the Ocean. The company’s focus is on the research and manufacture of the novel polysaccharide ulvan, taking advantage of the algae’s unique chemical versatility and remarkable biological features (antioxidant, antitumoral, antiviral). Ulvan will be extracted from seaweeds produced with organic fish and mollusks in an Integrated Multitrophic Aquaculture system (IMTA) with a circular economy approach.