Sea Butterfly (image) Aarhus University Caption This image shows a sea butterfly (Limacina helicina), a key Arctic sea snail. With the acidification expected in Arctic waters due to the increased concentration of CO2, populations of sea butterflies and other marine calcifying organisms can be severely threatened due to hampering of the calcification processes. Credit Photo courtesy of Kevin Lee Usage Restrictions None 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.