the impacts of microplastics (MP) on reef ecosystems are still larger unknown. Evidences from lab feeding trials that MP may be ingested by reef-building corals and cause adverse effects, i.e. necrosis and bleaching were recently collected, but ön fields̈tudies are still limited. For this reason, we established in our research center located in the Faafu Atoll (Maldives) several research campaigns devoted to highlight possible correlations between the raising presence of microplastics in the reef envronments and the health of the related marine organism . The vulnerability of the species selected for the biomonitoring prompt us to develop alternative analytical approaches to lower the impacts of the research, i.e we extensively implemented the use of solid phase microextraction as non lethal and solvent free sampling method. Surveys carried out till now on the subsurface water, shore sediments and marine invertebrates showed that MP are concentrated mostly inside the atoll rims and influenced by the Monsoons. Moreover, a positive correlation between the presence of MP in the subsurface water and of pthalates in the surveyed organisms was observed.