Project activities were the preparation of educational lectures and the production of a short screening on the protection of the Adriatic Sea and the threat posed by microplastic for the marine ecosystem and for people. Education was held as a part of Marine Tuesday at Public Library and in Primary School Šimun Kožičić Benje, Puntamika department. Children were familiarized with the problem of microplastic, small particles of plastics resulting from the decomposition of larger pieces under the influence of solar energy that become smaller and smaller, entering into the food chain of marine organisms and as a foreign body, with no nutritional value, is harmful for the marine organisms and its immune system. Ultimately, with the process of biomagnification plastic ends in the body of fish and as food for humans.