MBT
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Blue whale.
Scientific name: Balaenoptera musculus.
Size:30 metres (100 feet) in length.
Weight:140 tonnes or more.
It is believed to be the largest animal ever to have lived.
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1rst, On Earth Now, Elephant is the biggest Animal
2cd, Underwater, the Blue Whale is The biggest Animal
3rd and last as i Don't know what time you are taking about, in million years ago, it was the Dinosaurs which was the biggest animal.
Anonymous
The biggest animal is the mighty Brontosaurus.It was really big and was about 40 metres tall.It weighed about 100 tonnes!(200,000 pounds)
rick_c_91504
the blue whale is the largest on Earth. The elephant is the largest terrestrial animal.
caleythia1
The blue whale.