What is the biggeist animal in world?

It seems like you're looking for the "biggest" animal in the world, but the word you used is "biggeist." That word doesn't exist.

To answer your question, the biggest animal in the world depends on how you define "biggest."

* By weight: The blue whale is the largest animal on Earth, weighing up to 200 tons.

* By length: The blue whale is also the longest, reaching up to 100 feet in length.

* By volume: The blue whale again takes the title, as its massive size means it occupies the most space.

So, while there are different ways to measure "biggest," the blue whale reigns supreme in most categories.