But these are just the averages; the biggest blue whales on record are even more extreme. The heaviest blue whale ever recorded was a victim of whaling, caught in Antarctic waters in 1947.

Tourists on a whale-watching boat off Australia witnessed five families of killer whales attack 150-ton mammal.

That would not take the heavyweight title by itself. The biggest blue whale ever recorded weighed 190 tonnes, according to Guinness World Records. But the researchers estimated the ancient whale ...

The largest blue whale ever recorded measured a staggering 33 metres in length. Some think that the whale shark’s cartilaginous skeleton may prevent it from reaching larger, blue whale-like ...

The blue whale is the biggest animal that has ever existed. Whales can be found ... Cuvier's beaked whales hold the record for the deepest-diving mammal. They can go nearly 10,000 feet (3,000 ...

They include some of the largest animals on Earth. The blue whale is the biggest animal that has ever existed. Whales can be found in every ocean, with many species migrating long distances ...