[Request] how much lower would sea level be without whales?

Let me preface this by saying I am fairly dubious about my own calculations. So apparently there are 2 million whales in the ocean. I sifted through the average weight of a few types of whales and assumed an average mass of 5 tons (4,536 kg) for my calculation. I took the density of a whale to be that of water (1,000 kg/m3). From this I calculated the volume of all whales in the ocean to be 9.072106 m3. I took the difference between this volume, and the original volume of water in the ocean with whales in it (1.33210m3) and got a volume of 1.331910m3. Using the average depth of the ocean (3719 m), I calculated the original pressure at this depth to be 3.65107 m using P= rhogh. I then used Boyle's law for liquids to calculate the new pressure without whales present. I then plugged this pressure back into the p=rhogh equation and solved for the new height from which I got 3720.97 m. Therefore, the ocean depth would be apparently lowered by 1.97 meters, which is a value I have zero confidence in.

/r/theydidthemath Thread