Fish Video (video) Princeton University Loading video... Caption Princeton University researchers designed a "video game" for predatory fish that demonstrated that collective motion in animal groups might have evolved as a finely tuned defense against attack from predators. The researchers projected simulated prey onto one side of a tank containing bluegill sunfish. The bluegills were most likely to attack isolated prey (clip 1) and groups that did not move much (clip 2). Simulated prey that formed coordinated and mobile groups were less prone to attack, showing that group formation itself can dissuade a predator. Credit Courtesy of Science/AAAS 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.