Crown of Thorns in Action (IMAGE) Science in Public Caption Outbreaks of the coral eating crown of thorns starfish have been responsible for 42 percent of the over 50 percent decline in coral cover on the Great Barrier Reef between 1985 and 2012. Credit Katharina Fabricius, Australian Institute of Marine Science Usage Restrictions Approved for use in reporting the related PNAS paper, September 2012 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.