¦×«¢ (IMAGE) University of Bern Caption This pteropod, or "sea butterfly", a type of marine snail, shows damage to its shell (jagged line radiating from center) due to acidic ocean waters. Credit © National Oceanic and Atmospheric Administration NOAA Usage Restrictions None 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.