Crucian Carp 1 (IMAGE) American Physiological Society Caption Crucian carp swims in tank. Credit Matti Vornanen, University of Joensuu, Finland Usage Restrictions Must include credit line 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.