Swimming (VIDEO) Frontiers This video is under embargo. Please login to access this video. Caption Hyalocylis striata, a thecosomatous pteropod with an elongated shell Credit David Murphy and coauthors Usage Restrictions Credit artist 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.