Narwhals

Narwhals and belugas are used to living in an extremely quiet world.

Tom doesn't believe narwhals are real.

Tom doesn't believe that narwhals are real.

Narwhals have long tusks.

Narwhals use sound to navigate.

Narwhals are commonly called sea unicorns because of the males' long single tusk, almost half the length of their body.

There are narwhals swimming in the ocean.

Twenty narwhals were caught illegally, and nine persons were charged.

The narwhal is an odontocete or toothed whale, but is different from all other toothed whales in that it has no teeth in its mouth. Instead, male narwhals have a single long, straight tooth (or tusk) that protrudes two to three meters out of the upper left jaw. Females almost never have a tusk. The tooth grows in a counterclockwise spiral.