Margherita Concato is a PhD student in the Biomarker Laboratory under the supervision of Prof. Maria Cristina Fossi at the Department of Physical Sciences, Earth, and Environment, University of Siena (Italy). She graduated in Biotechnology in 2015 from the University of Florence and later in Ecotoxicology and Environmental Sustainability in 2017 at the University of Siena, with a thesis focused on studying the impact of microplastics on commercially important fish species. After graduation, she completed an internship and training period at the Centro Oceanográfico de Baleares Instituto Español de Oceanografía (COB-IEO), where she participated in research projects investigating the health of marine and coastal ecosystems and the impact of marine litter on marine organisms. She worked in a bromatological chemistry laboratory for two years. Currently, she is pursuing a Ph.D. focused on the study of marine litter and contaminants associated with plastics, titled “The fate of synthetic and natural microfibers in the marine environment and biota: differences and affinity with microplastics.”