Swimming Motion (IMAGE) University of California - San Diego Caption Instead of propellers, our robot uses soft artificial muscles to move like an eel underwater without making any sound. Credit University of California San Diego Usage Restrictions Please credit University of California San Diego 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.