These legendary animals have two teeth. In males, the more prominent tooth grows into a swordlike, spiral tusk up to 10 feet long. The ivory tusk tooth grows right through the narwhal's upper lip.

Do narwhals have teeth in their mouth?

For one, narwhals have no teeth. “They eat large fish, yet swallow them whole. If you look in its mouth there's nothing. ... They determined it was a canine and not an incisor because the tusk originates in the narwhal's maxillary bone, where canine teeth in mammals originate.

Do narwhals bite?

Narwhals don't use their teeth for biting or chewing. Instead, they suck their prey down whole.