Microplastics are tiny plastic particles up to 5mm in diameter. In the last four decades, concentrations of these particles appear to have increased significantly in the surface waters of the ocean. Concern about the potential impact of microplastics in the marine environment has gathered momentum during the past few years. The number of scientific investigations has increased, along with public interest and pressure on decision-makers to respond.The United Nations Environment Programme (2019) Microplastics. Available at: https://www.unep.org/resources/report/microplastics (Accessed: February 17, 2024).