Water flea with and without defences (IMAGE) Ruhr-University Bochum Caption Daphnia that grow in the presence of Utricularia (right) have a slightly different morphology than those who do not live together with the plant (left). However, the differences are almost invisible to the naked eye. Credit Martin Horstmann Usage Restrictions The image may only be used for reporting about the research by Martin Horstmann at Ruhr-Universität Bochum. 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.