Two Penguins
While penguins can’t fly, their stiff flippers, webbed feet, and sleek shape make them expert swimmers. In fact, they spend most of their lives in the ocean and do nearly all of their hunting for krill, squid, and crabs underwater. They can swim about 15 miles an hour, and when they want to go faster, they often porpoise, or leap out of the water as they swim.