Paragonaster hoeimaruae (IMAGE) University of Tokyo Caption Starfish are classed as echinoderms, a word which comes from the Ancient Greek for “hedgehog skin.” There are many types of starfish and this one is particularly adapted to living in sandy, muddy waters, a feature the researchers want to learn more about. Credit I. Kobayashi Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.