The PLASTOX project will investigate the ingestion, food-web transfer, and ecotoxicological impact of microplastics (MPs), together with the persistent organic pollutants (POPs), metals and plastic additive chemicals associated with them, on key European marine species and ecosystems. We will also study the temporal dynamics of MP colonisation by microbial communities in the field and the influence of microbial biofilms on ingestion rates and POP toxicity.