Great Barrier Reef coral in 2010 (IMAGE) University of Tokyo Caption Coral reefs grow in shallow waters where they remain covered by the sea but still receive sunlight. The remains of ancient reefs were examined to determine sea levels from long ago by a research team led by University of Tokyo Professor Yusuke Yokoyama. Credit Image by Hironobu Kan Usage Restrictions Re-use only with attribution to Hironobu Kan. Creative Commons license CC BY-ND. 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.