Image 3 (IMAGE) The University of Hong Kong Caption Sea urchins are essential to maintain function of coral reefs but may not be able to perform their role under increasingly intense marine heatwaves. Photo: Dr Bayden Russell. Credit The University of Hong Kong Usage Restrictions This work is licensed for non-commercial, non-exclusive, one-time usage with attribution to the copyright holder. 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.