Microplastic particles smaller than 5 mm in size are of increasing concern, especially in aquatic environments, such as the ocean. A primary source is microbeads (<1 mm) used in cosmetics and cleaning agents and fiber fragments from the washing of clothes, and secondary sources such as broken down plastic litter and debris. These particles are mostly made from polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), and polyesters. They are ingested by diverse marine fauna, including zooplanktons, mussels, oysters, shrimp, fish, etc., and can enter human food chains via several pathways.