Brain Coral (1 of 2) (IMAGE) Princeton University Caption The calcium carbonate skeleton of this living brain coral (Diploria labyrinthiformis) was evaluated for this study. From the coral, which is about one meter in diameter, the researchers extracted a small section of the skeleton without harming the coral. Credit Photo courtesy of the researchers. Usage Restrictions Use only in conjunction with this study. 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.