by eating
A narwhal tusk.
The whale that has a distinctive tusk is a narwhal it is native to the arctic ocean
A narwhal's tusk, which is actually a long, spiral-shaped tooth, can grow to be about 9 feet (2.7 meters) long.
The tusk of an adult narwhal can range from 1.5 to 3.1 meters (5 to 10 feet) and sometimes longer.
If a narwhal loses its tusk, it will not grow back. The tusk is a long, helical structure that is actually an elongated tooth, so once it is lost, it will not regenerate. Narwhals use their tusks for various purposes, so losing it could affect their ability to hunt, communicate, and navigate.
The narwhal is called the "unicorn of the sea" because of its long, straight tusk that resembles a unicorn horn. This tusk is actually a protruding tooth and can grow up to 10 feet long in males. The unique appearance of the narwhal has led to this nickname.
It is a tooth, not a tusk, and scientists have not yet discovered what it is for.
The tusk is rare and difficult to obtain.
Ivory.
ivory tusk
The Narwhal has a horn. Horse Isle Quiz- Narwhal.