Polystyrene Microspheres inside Gills (IMAGE) University of Exeter Caption This image depicts polystyrene microspheres inside the gills of a shore crab. Credit Andrew Watts Usage Restrictions Credit Andrew Watts 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.