The blue whale is generally believed to be the largest animal that ever lived. But there has been a jellyfish that was bigger than the blue whale. It was a lion's mane jellyfish found on the shore of Massachusetts Bay in 1861.
The Blue Whale is believed to be the largest species ever to exist on Earth.
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Well,the largest thing ever eaten by a green anaconda was a hippo..a female 3 year old hippo(:-apv
It would have been some sort of dinosaur of some sort but the largest animal that I've heard to ever live is the megalodon. http://www.karencarr.com/auto_image/auto_image_mid/VMNH_megalodon.jpg picture of what whales are to the megalodon
My butt is the largest
animal kingdom
Giganotosaurus