* Pacific Ocean: The largest ocean, with many different species of dolphins.
* Atlantic Ocean: Home to a diverse range of dolphin species, including bottlenose dolphins and Atlantic spotted dolphins.
* Indian Ocean: This ocean features unique species like the Indo-Pacific bottlenose dolphin and the humpback dolphin.
* Arctic Ocean: While the waters are cold, the Arctic Ocean is home to the white-beaked dolphin and the harbor porpoise.
* Southern Ocean: This ocean surrounding Antarctica is home to a variety of dolphin species, including the hourglass dolphin and the dusky dolphin.
While dolphins are mainly found in oceans, some species, like the river dolphins, live in rivers.