Blue Whales

Blue whales weigh between 150-170 metric tons. Their tongue alone weighs about 2.7 metric tons. A baby blue whale drinks up to 400 liters of milk a day and grows up to 90 kg in 24 hours. At birth, it weighs about the same as a full grown hippopotamus (about 2,700 kilograms).

Here are the links where I got the information = http://en.wikipedia.org/wiki/Blue_Whale and http://www.randomfacts.org/random-facts.html

And here is a video of a blue whale = http://www.youtube.com/watch?v=kbSUF3VByBg&feature=related