Swimming Nanomia (IMAGE) University of Oregon Caption Physonect siphonophores, marine animals related to jellyfish, swim via jet propulsion. Credit Please credit the Sutherland Lab. Usage Restrictions None 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.