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.
It depends on the size.
It would depend on which creature you are referring to. Possibly the narwhal has the longest tusk today
Narwhals don't have a "tusk" the facial horn is actually a tooth that has grown through the lip.
20 feet long.
The whale that has a distinctive tusk is a narwhal it is native to the arctic ocean
A curiosity and a source of amazement are what I think of a narwhal. It's curious how a narwhal looks, what with its frontwards projecting tusk that really is one of two teeth. That tusk may be a reason for its survival and for its decline. For example, the tusk may help a narwhal navigate ocean waters. At the same time, the tusk lures hunters in search of fortune. Also, it's amazing how a narwhal adapts to a challenging environment. For example, a narwhal calls Arctic waters home. Its coloring apes and therefore blends in with the play of light and shadow in the Arctic Ocean's upper waters.
The tusk is rare and difficult to obtain.
Ivory.
ivory tusk
by eating
The Narwhal has a horn. Horse Isle Quiz- Narwhal.
believe it or not, a narwhal's tusk is only 3 inches.
WALRUS! or... NARWHAL!
The Narwhal has a long ivory tusk.
Not braided, but twisted
It depends on the size.