NEW PHOTOS OF BLUE WHALE
The blue whale is the largest animal to have ever lived - it is about the size of 2000 people. 
The blue whale has a heart of the size of a car - about 1200 kg.
The blue whale travels surprisingly fast for such a large animal, it has been recorded at speeds of up to 30 mph (48km/h).
A blue whale's tongue can weigh up to 7000 kg.
Photos: Maria Torralba