Zoanthids covering dead coral (IMAGE) Ecological Society of America Caption A new study in Ecosphere suggests that marine animals called zoanthids, seen here blanketing dead coral, can deter reef-eroding urchins (visible at lower right). Credit Patrick Saldaña Usage Restrictions To promote this press release 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.