A group of dolphins is called a pod. Sometimes it is called a school of dolphins. The pod usually consists of around 12 to 200 dolphins. There are also super pods with thousands of dolphins, which are composed of a number of smaller pods.
Super pods, or herds, are usually only short term and are created in places where there is high food availability. Very small pods are the ones created on the biological level, that is mates, mothers and their offspring. Larger pods create a society to serve the dolphins' needs for communication, hunting and searching for food and protection from predators. Dolphins are well known for their friendly and sociable characteristics.