Bryan McAllister’s personal reference notebook
September 12, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Field Notes • Marine Mammal

Narwhal

The narwhal is a species of toothed whale native to Arctic waters.

Updated September 12, 20261 min readCited sources

The narwhal is a species of toothed whale native to Arctic waters. It is best known for the long tusk usually present in males, which is an elongated tooth.

What it is

The narwhal (Monodon monoceros) is a toothed whale and the only living member of its genus. It belongs to the family Monodontidae, which it shares with the beluga whale. Narwhals are classified as toothed whales but lack a full set of visible teeth.

Key details

Narwhals are medium-sized whales with mottled grey-and-white colouring and a shallow ridge instead of a dorsal fin. Males usually develop a long, spiralled tusk formed from an elongated tooth. They are deep-diving carnivores that feed on Arctic fish and squid.

Where it lives

Narwhals inhabit Arctic marine waters, especially around Canada and Greenland. They are closely associated with sea ice and migrate seasonally between offshore wintering areas and coastal summering grounds.

In short

  • Narwhals are Arctic cetaceans found in high-latitude waters.
  • Males typically have a long tusk formed from a tooth.
  • They are closely related to beluga whales.
  • Conservation status is listed as Least Concern.
Canadian angle

Narwhals are strongly associated with the Canadian Arctic, where they are found in waters around Nunavut and other northern regions and have long been important in Inuit subsistence and culture.

Quick questions

What is a narwhal?
A narwhal is an Arctic toothed whale, scientifically named Monodon monoceros.
Why are narwhals called the unicorns of the sea?
They are nicknamed the unicorns of the sea because males usually have a long tusk that resembles a horn.
Are narwhals whales or dolphins?
Narwhals are whales, specifically toothed whales in the suborder Odontoceti.

Sources

  1. Encyclopaedia Britannica — https://www.britannica.com/animal/narwhal
    Supports: Species identity, Arctic habitat, and general characteristics.
  2. NOAA — https://www.noaa.gov/ocean-fact/narwhal/
    Supports: Toothed whale status, tusk description, and Arctic distribution.
  3. National Geographic — https://www.nationalgeographic.com/animals/mammals/facts/narwhal
    Supports: Scientific name, size, diet, and conservation status summary.
  4. IFAW — https://www.ifaw.org/animals/narwhals
    Supports: Range, tusk development, migration, and Canadian Arctic relevance.
  5. Wikipedia — https://en.wikipedia.org/wiki/Narwhal
    Supports: Only living member of genus Monodon and family classification alongside beluga.