Gas Hydrate Mounds in Arctic Ocean (image) CAGE - Center for Arctic Gas Hydrate, Climate and Environment Share Print E-Mail Caption One of the gas hydrate mounds, also known as pingos, on the ocean floor in the Arctic. Illustration: Pavel Serov. Credit Pavel Serov; CAGE - Centre for Arctic Gas Hydrate, Environment and Climate Usage Restrictions None Share Print E-Mail 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.