Dolphin/ˈdɑːlfɪn/ Definition 1 of 3Pro Tip 1/3Not a Fish Dolphins are mammals, not fish, which is a common mistake. Dolphins breathe air through lungs, just like mammals. Pro Tip 2/3Social Creatures Dolphins are very social and often found in groups called pods. A dolphin pod cooperates in hunting and provides safety. Pro Tip 3/3Intelligence Highlights Highlight their high intelligence, comparing to other animals. Dolphins can learn complex tasks, showing their intelligence.