Alga with Feeding Enemy (IMAGE) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Caption Gracilaria vermiculophylla and its native feeding enemy Littorina brevicula. Credit F. Weinberger, GEOMAR. Usage Restrictions Usage only in the context of this article, otherwise written permission required 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.