Shark Tagging in Delaware (image) University of Delaware Share Print E-Mail Caption Delaware researchers are tagging sand tigers to learn about the sharks' migrations. Credit Matthew Breece Usage Restrictions Image must include credit to Matthew Breece. Share Print E-Mail 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.