After 22 long years of observation, scientists have concluded that dolphins have a preference for who they choose to hang out with. The main example of this phenomenon is among populations of dolphins that use sea sponges to assist in hunting for food. Sea-sponging dolphins are usually known for being the loners of the dolphin world, but when they do choose to socialize, they prefer the company of others who hunt in the same way. It could be compared to human-like patterns, such as people who work in the same office going out for a drink together.
