Except for the fresh water dolphin. The fresh water dolphin could probably live in the Great Lakes. It might be in Lake Erie. There are 33 different kinds of dolphins. Most dolphins live all over the world in oceans.
Some dolphins live in fresh water.
That kind of dolphin is called a Fresh Water Dolphin. The smallest dolphin is called Commer's Dolphins and the biggest dolphin is the Killer Whale. Dolphins eat fish and squid. Some dolphins eat killer whales, seals, sea lions, penguins, and other whales. When dolphins dive or go back under water they close their blowholes so water will not get in their lungs.