Thinning Shells (IMAGE) NOAA Headquarters Caption This image depicts the difference in thickness between two specimens of the pteropod Limacina helicina, one collected in more acidified coastal waters, the other collected off shore, that were analyzed as part of a new study published in Science Reports. Credit Courtesy of Lisette Mekkes, Naturalis Biodiversity Center; used with permission. 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.