The Biomat research group of the University of the Basque Country (UPV/EHU) is studying marine waste on the Basque coast (squid, fish and algae waste) to obtain new materials. This line of research is offering a fresh take on plastics aligned with the principles of the circular economy, which is based on preserving and improving natural capital by controlling finite stocks and balancing the flows of renewable resources. In this context, the group's research is highlighting, in particular, the upgrading of industrial by products or waste through processes that minimize the use of resources to obtain competitive, sustainable products.