Sand Tiger Shark (image) University of Chicago Caption Both graceful and docile, this modern sandtiger shark swims through a school of round scad fish in the coastal waters off North Carolina. Modern sand tigers prefer waters of high salinity, though they tolerate brackish waters for short periods as well. Credit Erik Rebeck Usage Restrictions News organizations may use this image in connection with reports about the research of Sora Kim and her colleagues. 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.