Penguins have a thick layer of fat that protects them from their cold environment and camouflaged skin that helps them blend into their surroundings. Penguins can also drink salt water and excrete the salt out of a gland near their eyes.
Penguins are some of the most well-adapted animals in the animal kingdom. Those penguins living in the coldest climates in the world are adapted to allow their circulatory system to warm their important organs during the coldest weather.
Penguins have streamlined bodies and webbed feet that make them excellent swimmers, and they can swim at speeds of up to 15 miles per hour. Their feathers protect them from the extreme cold and they coat their feathers with oil that comes from a gland near the tail, that increases their speed in the water.