Rhabdopleurid Colony (image) University at Buffalo Caption This is a colony of A Rhabdopleura compacta. Rhabdopleurids, which have lived at the ocean bottom for some 500 million years, build such colonies from collagen they secrete. Credit University of Edinburgh Usage Restrictions This photo may only be used in conjunction with stories that highlight the research outlined in the news release. 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.