Toothed whales can use vocal registers like humans to communicate and hunt.
Like Kim Kardashian, whales have a "vocal fry" which can be used to find prey in deep sea.
This gives them access to falsetto, which allows them to make their high-pitched whistles, and the chesty, vocal fry range, which is how they make echolocation.
Christian B. Christensen, Aarhus UniversityAn affectation that shaped toothed whales' evolutionTeglberg and Elemans say this has very much influenced the way dolphins, orcas, and other toothed whales evolved a "Mona Lisa" fixed smile on their face.
"While vocal fry may be controversial in humans and may be perceived as everything from annoying toauthoritative, it doubtlessly made toothed whales an evolutionary success story", Elemans adds.