Purple Marsh Crab Consumer Front (IMAGE) Virginia Institute of Marine Science Caption The impacts of purple marsh crabs on salt marshes can be viewed from space. The crabs leave expansive, fan-shaped mudflats as they burrow into the marsh and consume large swaths of cordgrass. Credit Virginia Sea Grant Usage Restrictions This image may only be used in conjunction with reporting on the study described in this release 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.