Healthy corals (IMAGE) Oregon State University Caption A healthy coral reef in 2012 in the Northern Mariana Islands. A year later, the reef was dead. The reef is a symbol of how climate change is already transforming ocean environments. Credit Steven Mana‘oakamai Johnson Usage Restrictions None 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.