<i>Cratena peregrina</i> (IMAGE) University of Portsmouth Caption This is the nudibranch, or sea slug, that feeds on hydroid colonies. Credit Gabriella Luongo 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.