Heron Island (IMAGE) Duke University Caption The reefs at Heron Island, north of Brisbane Australia, are among the world's coral reef ecosystems most threatened by warming waters and increased ocean acidity. If they collapse, so too may the shoreline economies that rely on the reefs for tourism and food. Credit Catlin Seaview Survey Usage Restrictions Permissions (all or registered reporters) All Usage restrictions (if any) Images are available for download free of charge for non-commercial use by media or individuals. All images remain copyright XL Catlin Seaview Survey / Underwater Earth. 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.