Fiddler Crab (IMAGE) King Abdullah University of Science & Technology (KAUST) Caption Fiddler crabs play an important role in sediment mixing in mangrove ecosystems. Credit © 2019 Marco Fusi 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.