Sponge (IMAGE) University of Sao Paulo Scientific Outreach Unit Caption Clathria nicoleae is one of the sponge species found in the Amazon reef system. Sponges are dominant in some areas of this reefs. It differs from coral reef systems where coral species have dominance. Credit ScienceAdvances Usage Restrictions credits to ScienceAdvances http://advances.sciencemag.org/content/2/4/e1501252 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.