Here are some contenders for the title of "biggest animal in the world" depending on how you measure:
* By weight: The blue whale is the heaviest animal on Earth, weighing up to 200 tons!
* By length: The blue whale also holds the title of longest animal, reaching lengths of up to 100 feet.
* By height: The giraffe is the tallest land animal, reaching up to 19 feet tall.
* By wingspan: The wanderer albatross has the largest wingspan of any bird, reaching up to 11 feet.
So, the answer to your question really depends on what you're looking for. 😊