Algal Crusts on Tektite Reef (image) Carnegie Institution for Science Share Print E-Mail Caption Orange peyssonnelid algal crusts spreading over a lobe of Orbicella annularis at 14-meter depth on the Tektite reef on the southern shore of St. John, U.S. Virgin Islands. Credit Image courtesy of Peter Edmunds. Usage Restrictions With credit Share Print E-Mail 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.