Boxfish Scutes (IMAGE) University of California - San Diego Caption Each hexagonal scute in the boxfish's armor has a raised, star-like structure in the center that distributes stress across the entire surface. Underneath the scutes lies a flexible, yet hard to penetrate, inner layer of interlocking collagen fibers. Credit Jacobs School of Engineering/UC San Diego Usage Restrictions Please credit Jacobs School of Engineering/UC 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.