A mesophotic reef (IMAGE) University of Exeter Caption Coral reefs are fragile ecosystems and become increasingly dominated by lettuce-like and encrusting morphologies at mesophotic depths Credit Prof Peter Mumby Usage Restrictions This image may only be used with reports of this research 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.