Horseshoe Crab (IMAGE) University of New Hampshire Caption Horseshoe crabs were placed in underwater running wheels to monitor their movement after being bled. Credit Chris Chabot, Plymouth State University Usage Restrictions None 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.