Samples of microplastics (IMAGE) Kyushu University Caption Microplastic samples collected from the oceans. Plastic fragments less than 5 mm in length are categorized as microplastics. The scale bar shows a length of 2000 µm or 2 mm. Credit Kyushu University/Asahi Kasei Corporation Usage Restrictions Only for media and non-commercial use License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.