A Weddell seal with a CTD tag (IMAGE) Research Organization of Information and Systems Caption A Weddell seal with a CTD tag attached on the head. Credit Photo by Nobuo Kokubun (NIPR) Usage Restrictions News organizations may use this image, with proper attribution, as part of news coverage of this paper only. License Original 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.