Horseshoe Crab (image) National Science Foundation Caption This image shows a horseshoe crab in sand at Monomoy National Wildlife Refuge, Mass. Credit Bill Perry, U.S. Fish and Wildlife Service Usage Restrictions None 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.