OtterKnow Kids EncyclopediaThe blue whale is the biggest animal in the whole world! It is even bigger than the largest dinosaurs. Blue whales are gentle giants of the ocean.
Blue whales are blue-gray in color and can be as long as three school buses. A blue whale’s heart is so big that a small child could crawl through it. Their tongue alone weighs as much as an elephant!
Blue whales eat tiny little animals called krill. They can eat millions of krill in just one day! Blue whales open their huge mouths and gulp in big mouthfuls of water, then push the water out and keep the krill.
