The narwhal is the only one I can think of.
Probably a narwhal or a rhino
Made of ivory, many poachers are illegally hunting narwhals for their valuable horns.
Dude, they're whales with unicorn horns. What's NOT interesting about that?
Firstly you don't need to say whale after narwhal, secondly the unusual fact about them is that their horns are infact tusks and are very suseptable to pain.
Yes, but a narwhal having more than one horn is a rare occurrence. The scientific name for the narwhal is Monodon monoceros. The designation comes from the Greek for 'one tooth one horn'. Indeed, the male narwhal tends to have one horn, and the female none. But there are rare, recorded instances in which a male has two horns and a female one. There also is the one known, recorded instance of a female having two horns.
The Narwhal has a curve in its mouth making it appear to smile all the time. The Narwhal has a large tusk that made reminded sailors of the mystical Unicorns.
it is made of ivory
There is 1 type of whale that has a horn. It is called a Narwhal. It has a spear like horn coming out from above its upper lip.
A tusk really is a tooth. Therefore, there are elephant, narwhal and walrus tusks. Tusks sometimes are called horns. But horns aren't necessarily teeth. An example is the rhinoceros, whose horn isn't a tooth at all.
It is illegal to hunt Narwhals and to use their horns. If you are really unsure you can get a more specific answer from a Google search :)
Because no narwhals have horns! However, both male and female narwhals have tusks. Males are more likely to have two tusks, but you can't necessarily see a narwhal and judge its gender based on its tusk.