Early illustration of two narwhals, or sea unicorns by E Cuvier. One has been depicted with two tusks. Narwhals, Monodon monoceros, are toothed whales that live mostly in Arctic coastal waters and ...

A narwhal tusk that is nearly seven feet long is extremely rare. Here's where you can see it in Massachusetts.

4. Narwhal tusks can grow up to 10 feet long. Male narwhals average 15 feet in length and weigh 3500 pounds, not including their tusks, which begin protruding from their mouths at age 3 and ...

Like walruses and elephants, male narwhals (Monodon monoceros) grow tusks; these are modified teeth. In narwhals, the left tooth erupts from their head, reaching more than 8-feet-long in some ...

Each male has a tusk, and occasionally two tusks, but fewer than 15% of females have one. The narwhal tusk is a marvel of engineering. It is both very strong and very flexible – which is unusual ...