The Neckteeth of a Daphnia (IMAGE) U.S. National Science Foundation Caption This is a juvenile Daphnia with and without defensive neckteeth. Credit Christian Laforsch, Ludwig-Maximilians-Universitat, Munich Usage Restrictions None License Licensed 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.