Dolphins are highly intelligent and social marine mammals.

Manatees are large, gentle marine mammals who eat only aquatic plants.

Members of the weasel family, otters are known for their elongated bodies, webbed feet and playful antics, particularly their love of sliding down rocks, banks or waterfalls.

Sporting their tux-with-tails plumage, penguins are one of Earth’s most charismatic and recognizable birds.

These sleek, beautiful animals live in coastal waters, hunting for fish in the sea and returning to land to give birth to their young.

Whales are awe-inspiring giants of the sea.

Turtles have been roaming the Earth for millions of years—but now dozens of these “slow and steady” species are racing toward extinction.