Fish are aquatic animals who live in diverse habitats.

Guinea pigs are gentle, curious pets.

Hamsters are desert-dwelling rodents who have become popular pets.

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

Mice and rats are curious, social animals who can make excellent pets.

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 shy, gentle animals share our neighborhoods—and sometimes our homes.

Whales are awe-inspiring giants of the sea.