Dolphins are mammals. They are less then 10 feet long and weigh about 500 kilograms which is 1,100 pounds. They have 80 to 100 teeth in their mouth to help them eat fish.
Dolphins live in groups called pods. Dolphins like to play games with other dolphins and other sea animals. Dolphins have many ways of communicating like squeeks or eeks. There are really special sounds too. Dolphins sleep with one eye open to keep swimming.
Dolphins live in water habitats like oceans and seas. Some dolphins live in wide rivers in Asia and South America. Dolphins live in warm water too. Really dolphins live all over the world.