Symbiotic Algae and Coral (IMAGE) University of Queensland Caption This is symbiotic algae growing inside the coral polyps of Acropora tenuis. Credit Katarina Damjanovic. Usage Restrictions Please credit 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.