Where do dolphins live?

Generally, dolphins live in every ocean and river except the freezing waters of the arctic and antarctic. There are three different types of dolphin and they live in different areas, however.
The Bottle Nosed Dolphin
The most common variety of dolphin is the bottle nosed dolphin. These dolphins live in every Ocean except of course the Arctic ocean. They are found in warmer waters, usually in similar areas as sharks who prefer warm water as well. These dolphins are the largest species of dolphin, growing to be up to thirteen feet long and weigh nearly half a ton. They feast on small fish that lives in the area and travel in groups of as much as 1000, though usually between five and fifteen.
Atlantic Spotted Dolphin
Another type of dolphin is the Atlantic Spotted Dolphin. Unlike the bottle nosed dolphin, these dolphins live in the colder waters of the north atlantic ocean, though many of them do swim more to the center for warmer waters around Florida and South America. These are the dolphins that are seen swimming with whales on New England whale watching tours. They are differentiated by the spots on their skin, as their name will suggest. These dolpins are smaller than the bottle nosed dolphins, typically around seven and a half feet long and weight around three hundred pounds.
Amazon River Dolphin
The last variety of dolphin is the Amazon River dolphin and you can only imagine where they live. Unlike the bottle nosed dolphin and the Atlantic spotted dolphin, the Amazon River dolphin lives in the fresh waters of the Amazon River in SOuth America. This dolphin is very different from the above mentioned ones. These have much fewer but stronger teeth and only eat crabs and other things with shells. They can only be found in northern South American rivers.