Freshwater pearl mussels (IMAGE) University of Jyväskylä - Jyväskylän yliopisto Caption Freshwater pearl mussels. Credit Mikko Ranta Usage Restrictions Can be used in news and social media posts with picture credit information included. License Original 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.