The blue whale is the biggest animal in the world.

The longest of the blue whale is 26 meters in Pacific Ocean, and 30 meters in the Arctic Ocean . A blue whale is going to eat 4 tons shrimps ( 虾 ) in a day. The weight of a whale is 150 ， 000-200 ， 000 kilograms. A tongue of a whale is 2000 kilograms, the head bones are 3000 kilograms, a liver （肝脏） is 1000 kilograms and a heart is 500 kilograms.