Results presented from the first year of operation of Guardians of the Coast, one of the biggest citizen science projects in Italy, promoted by the Costa Crociere Foundation. The initiative actively involved 156 secondary schools , over 600 teachers and 5,700 students during the 2017-2018 academic year. Each school "adopted" a section of the Italian coast, covering a total of 2,610 km , equal to one third of the country's natural coastline.