Diving to depths of 328 feet (100 meters) to munch on millions of krill each day, the blue whale takes the prize for the largest creature alive (and ever to exist!).
These blue-gray giants extend about 80 to 100 feet (24.4 to 30.5 m) in length and weigh about 400,000 pounds (181,437 kilograms). That's equivalent to the weight of 135 Volkswagen Beetles. Its tongue alone weighs 5,400 pounds (2,449 kg), And the heart of a blue whale is about the size of a VW Beetle.
Even at birth, blue whales are quite large and are considered the largest babies on earth. A blue calf is approximately 26 feet (8 m) long and weighs about 8,000 pounds (3,629 kg), according to the World Wildlife Fund.