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Because they eat a lot. They also live in a vast open space with eanough room and oxygen produced by alge to enable them to grow.
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Are blue whales the largest whales in the world?
yes
Is the blue whales heart the largest?
yes. blue whales have the largest heart in the world
What is the world's largest living animal?
blue whales are the largest in the world.! (:
What are the world's largest sea animals?
The world's largest sea animals are whales.
What are blue whales?
they are the largest mammal in the world.
What is the llargest mammal in the world?
Blue whales are the largest mammals in the world.
Are whales the largest mammals?
Yes, whales are the largest mammals.
What is the largest animal in the world and is filter feeder?
Baleen whales I would imagine
What is the largest mammal the world?
The Blue Whale. Also known to be the largest animal ever.
Are whales the largest fish?
No. Whales are not fish, they are mammals. The largest fish is the Whale Shark.
What is the biggest zoo animal?
Elephants are the largest land mammal, but the biggest mammal in the world is not on land, but in the ocean--whales are definitely the largest mammals in the world.
Are fin whales the second largest whale in the world?
Fin whales are the second largest whale. As well they are the second largest living animal on earth behind the blue whale. The can weight up to 80 tons and be at length of 72 feet.
