The nose of cetaceans has been modified greatly as a result of the transition from a terrestrial to an aquatic lifestyle. ... The nasal turbinates are reduced in obligate aquatic whales, including basilosaurids and neocetes.

Do whales have a nose?

As mammals, toothed whales have to breathe air into their lungs. Other mammals can breathe through their mouth, or their nose, which sits right on top of it. In toothed whales, the nasal passage runs up above its eyes, creating a blowhole on top of its head. When it surfaces, it opens the blowhole to breathe.

Do orca's have noses?

How do Whales Breathe? Whales have lungs they use to get the oxygen they need by breathing air (like humans). But instead of breathing through their mouth, they breathe through their nostrils, called blowholes, located on top of their heads.