They are marine mammals, meaning they are mammals that live in the sea.
While some whales prefer certain areas, such as colder waters or warmer waters, they can be found in all oceans, including:
* The Pacific Ocean
* The Atlantic Ocean
* The Indian Ocean
* The Arctic Ocean
* The Southern Ocean
They can be found in different depths of the ocean, depending on their species and what they are looking for (food, breeding grounds, etc.). Some whales prefer the surface, while others spend more time in deeper waters.