Coralline Algae in a Sea Urchin Barren (IMAGE) University of British Columbia Caption Coralline algae in a sea urchin barren. Credit Jenn Burt 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.