Glochidium larvae (IMAGE) University of Jyväskylä - Jyväskylän yliopisto Caption A microscopic image of the glochidium larvae of freswater pearl mussel on the gill of a host fish. Credit Jouni Salonen / University of Jyväskylä 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.