Jellyfish vs. Medusoid (image) California Institute of Technology Share Print E-Mail Caption The top shows a comparison of real jellyfish and silicone-based Medusoid. The bottom is a comparison of muscle architecture in the two systems, including macroscopic view superimposed on body (left) and close-up on striated muscle contractile fibers (right). Credit Caltech / Janna Nawroth Usage Restrictions Okay with credit. 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.