Predatory Behavior of M. Xanthus Bacteria (IMAGE) University of Iowa Caption Image shows swarm of M. xanthus bacteria (left) invading a colony of prey bacteria (right). The rippling pattern is the highly organized behavior of thousands of M. xanthus cells working in concert to digest the prey. Credit John Kirby, University of Iowa Carver College of Medicine 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.