What is a social behavior of certain animals travel together in groups to protect individuals within the group or to fool a predator into thinking the group is one large organism?

This social behavior is known as "mobbing" or "flocking." Animals, such as birds and fish, travel in groups to enhance their protection against predators through collective vigilance and confusion tactics. By moving as a cohesive unit, they can make it difficult for predators to target individual members, effectively creating the illusion of a larger, more intimidating organism. This behavior increases survival rates and promotes social bonding within the group.