Starfish on the Ocean Floor (IMAGE) University of Plymouth Caption A large starfish (possibly a species of the genus Hymenaster). This animal is rare and only seen a handful of times. Credit University of Plymouth Usage Restrictions None 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.