When most people think of mammals while diving, whales and dolphins come to mind. These fast-swimming cetaceans may enjoy iconic status, but the world of mammals seen while diving is far more diverse and fascinating than many realize. In addition to whales and dolphins, this group also includes pinnipeds such as seals and sea lions, the gentle manatees, and the ever-charismatic sea otters. These animals can be found in a wide variety of habitats—from the sun-drenched tropics to the icy expanses of the polar seas. While most marine mammals live in saltwater, there are exceptions that bring their charm to freshwater ecosystems. Playful freshwater otters and seals can be found in rivers and lakes in many parts of the world. Whether diving in the ocean or exploring freshwater habitats, encountering these animals in the wild is an exciting and unforgettable experience.

Manatees can be encountered by divers and snorkelers alike in both salt and freshwater and are extremely abundant in the rivers and bays of Florida in the United States. Diving with sea lions and seals is always an exciting adventure as they are extremely curious and hardly shy. There is nothing like being buzzed right overhead by a fast swimming sea lion or getting your snorkel chewed on by a friendly seal. If you are looking for a stimulating dive with one of these cute and curious mammals then check out our list which includes the elephant seal, fur seal, sea lion, dugong,manatees and otters to learn more and to explore the best dive sites around the world where you can dive with each one.