Sally Leys, University of Alberta (IMAGE) University of Alberta Caption UAlberta biologist Sally Leys is co-author of the new study, which has implications for sponges and marine ecosystems. Image provided. Credit John Ulan 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.