Aldabra Atoll (IMAGE) CABI Caption Aldabra is among the world's largest coral atolls but, like many World Heritage Sites, is at risk from invasive alien species (Courtesy of Adam Plezer, Seychelles Islands Foundation). Credit Courtesy of Adam Plezer, Seychelles Islands Foundation Usage Restrictions Please credit Adam Plezer, Seychelles Islands Foundation 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.