Aldabra atoll, (IMAGE) University of Oxford Caption Aldabra atoll, the largest coral reef system in Seychelles. Credit: Christophe Mason-Parker Credit Christophe Mason-Parker Usage Restrictions The image can be used for editorial purposes only and must be credited. It must NOT be distributed to third parties. License Original 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.