The walrus and the narwhale are the most obvious living species, but male dugongs and some beaked whales can also have large tusks.    From Wordnik.com.  [BoarCroc] Reference

And the tusk on a narwhale is on the LEFT side of it's upper jaw.    From Wordnik.com.  [Narwhalrus] Reference

PS neither whalrus nor narwhale can dive very deep, so this is not a good choice for "creature of the deep".    From Wordnik.com.  [Narwhalrus] Reference

While elephant's tusks provided ivory for the southern races, the more northern peoples used the walrus and narwhale tusks.    From Wordnik.com.  [Arts and Crafts in the Middle Ages A Description of Mediaeval Workmanship in Several of the Departments of Applied Art, Together with Some Account of Special Artisans in the Early Renaissance] Reference

The fabulous unicorn's horn, which is so often alluded to in early literature, was undoubtedly from the narwhale, although its possessor always supposed that he had secured the more remarkable horn which was said to decorate the unicorn.    From Wordnik.com.  [Arts and Crafts in the Middle Ages A Description of Mediaeval Workmanship in Several of the Departments of Applied Art, Together with Some Account of Special Artisans in the Early Renaissance] Reference

Because Magnum P.I. wore one ... and the narwhale approves.    From Wordnik.com.  [reddit.com: what's new online!] Reference

The body of the narwhale is covered with a layer of blubber, of about two inches in thickness.    From Wordnik.com.  [Stray Leaves from an Arctic Journal; or, Eighteen Months in the Polar Regions, in Search of Sir John Franklin's Expedition, in the Years 1850-51] Reference

In the abridged London edition of 1807, there are plates of an alleged "whale" and a "narwhale.".    From Wordnik.com.  [Moby Dick, or, the whale] Reference

In the abridged London edition of 1807, there are plates of an alleged 'whale' and a 'narwhale'.    From Wordnik.com.  [Moby-Dick, or, The Whale] Reference

I still don't see the bird in that first picture. sort of looks like a narwhale when just looking at the head.    From Wordnik.com.  [Apartment Therapy Main] Reference

It may also be that the old York was a center for narwhale ivory and both ivories were called by the same name.    From Wordnik.com.  [The Big Apple] Reference

In old Norse times, the thrones of the sea-loving Danish kings were fabricated, saith tradition, of the tusks of the narwhale.    From Wordnik.com.  [Moby Dick, or, the whale] Reference

The WHALEBONE of the mediaeval writers, which is described as very white, is doubtless the ivory of the walrus or of the narwhale.    From Wordnik.com.  [Earth as Modified by Human Action, The~ Chapter 02 (historical)] Reference

Canada 's under-rated surfing industry will get a much-needed boost, especially for the beluga narwhale surfers of Melville Island.    From Wordnik.com.  [The Toque] Reference

Howard Beale and real-life characters like Steven Slater and Domino's Pizza Guy, who call customers "bovine and porcine" and tell people to "go straddle a narwhale.".    From Wordnik.com.  [Forbes.com: News] Reference

Then they came for the narwhales, and I did not speak out -- because I am not a narwhale; you'll need to login or register to do that is it really that easy? only one way to find out.    From Wordnik.com.  [Original Signal - Transmitting Buzz] Reference

Yet, getting these kids to show their work on a test (or even homework sometimes) -- work that we have practiced for days, weeks, or months -- is like pulling the back teeth of a narwhale!.    From Wordnik.com.  [Learn Me Good] Reference

Us parents are now officially in the value stream. redwolfwalker Dolphin named as Indias national aquatic animal darrellwade Baby Animal Guide:: Mammals:: Common Wombat johntunger @KelaineD I like your piece about being menace by a narwhale.    From Wordnik.com.  [Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7] Reference

I do not wish to seem inelegant, but this unsightly whale looks much like an amputated sow; and, as for the narwhale, one glimpse at it is enough to amaze one, that in this nineteenth century such a hippogriff could be palmed for genuine upon any intelligent public of schoolboys.    From Wordnik.com.  [Moby Dick, or, the whale] Reference

A better choice would have been a mix between a sperm whale and narwhale.    From Wordnik.com.  [Narwhalrus] Reference

Or maybe it was a narwhale, I forget now.    From Wordnik.com.  [Catch-up « knitnut.net] Reference

Just as many of the birds above are sea-related, the Norsemen, and presumably Norsewomen, were also interested in what lived below the surface: bloat (er), Scand brisling; flounder, hake, the whales narwhale (formed on ON nár.    From Wordnik.com.  [VERBATIM: The Language Quarterly Vol XI No 3] Reference

The narwhale, and the seal.    From Wordnik.com.  [Lyra Heroica A Book of Verse for Boys] Reference

And the monstrous narwhale swalloweth.    From Wordnik.com.  [The Early Poems of Alfred Lord Tennyson] Reference

(like the ferocious "rook" in the narwhale ivory chessmen in the British.    From Wordnik.com.  [The Danish History, Books I-IX] Reference

“whale” and a “narwhale.”.    From Wordnik.com.  [Moby Dick; or the Whale] Reference