This proposed project will develop a heat map or a hotspot map describing the extent of microplastic contamination in the major aquatic environments in Mindanao. In particular, the sites of interest where the survey will be conducted are the major rivers and bays in Mindanao, such as Butuan Bay, Agusan River, Macajalar Bay (Cagayan de Oro), Cagayan River, Moro Gulf, Liguasan Marsh, Davao Gulf, and Davao River. Microplastic assessment will be done in various samples, fish, sediments, water, and other aquatic microorganisms. Likewise, preliminary identification of microplastics will be done using FT-IR analysis. Also, potential screening of stress biomarkers will be determined. Coordination with the different LGUs will be done as to the conduct of the sample collection, presentation of results, and the development of policy notes.