If you've ever seen one (I have) then there is no doubt it's the largest animal on earth.
The largest animal ever captured and held in captivity is the Killer Whale (Orcinus Orca).
The blue whale is the largest sea animal, and also the largest animal that ever existed.
no infact the worlds largest animal is the blue whale
the largest animal existing on this planet is the blue whale and is possibly the largest animal ever to have existed on the planet.
The largest prehistoric animal ever was the Basilosaurus which was a 59 foot whale. The largest crocodilian was the 39 foot long Sarcosuchus Imperator.
Nile River
The largest animal ever is the Blue Whale which measures approximately 30 metres in length
Dinosaur
The largest animal ever is the blue whale ...although it didn't quite walk on earth. http://en.wikipedia.org/wiki/Largest_organisms
The Blue Whale is the largest cetacean, and is also the largest animal ever to have lived on earth.
The Blue Whale is the largest animal to ever exist.