Here is a video about the Blue Whale http://www.youtube.com/watch?v=8YtC-VagE4Y. The blue whale is the largest animal that has ever lived on earth. It can weigh up to 300,000 lb and grow as long as 110 feet! The blue whale occurs mostly in cold and temperate waters. It prefers deeper ocean waters as opposed to coastal waters. The blue whale is the largest creature that has ever existed on earth. It is bigger than 25 elephants; bigger than a Brontosaurus and a Tyrannosaurus rex combined. A blue whale calf is about 23 feet long at birth!