Porites Coral from Abu Dhabi Reefs (IMAGE) University of Southampton Caption A new type symbiotic alga lends its brown color to a Porites coral from Abu Dhabi reefs. Credit Wiedenmann, Burt 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.