Acoel flatworm (IMAGE) Hiroshima University Caption The acoel flatworm is about 3 mm long in size. This photo shows this animal's orange-colored head on the right side and its green tail on the left. Credit Courtesy Kunifumi Tagawa/Hiroshima University Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage related to this feature story only. 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.