They are two different mechanisms though, it could be that the swimming motion mechanism has a far smaller effect. Google tells me there are 360,000 sperm whale

They are two different mechanisms though, it could be that the swimming motion mechanism has a far smaller effect. Google tells me there are 360,000 sperm whales, that would make the combined effect of the swimming of all sperm whales similar to that of 60 km x 60 km of forest.