Sealife guideThe narwhalMonodon monoceros

Last updated on 03/07/2025 at 11:54 PM
The narwhal (Monodon monoceros)
The narwhal (Monodon monoceros)
Taxonomy
  • Common name: Narwhal, unicorne, sea unicorn, sea canary, horned whale, hog
  • French name: Narval, licorne de mer
  • Scientific name: Monodon monoceros (Linnaeus, 1758)
  • Family name: Monodontidae
  • Order name: Cetacea
  • Class name: Sea mammals [Mammalia]
Description
Its scientific name « Monodon monoceros » describes it as the whale with one tooth and a horn. Indeed, the narwhal is characterized by the presence of two teeth, with the upper one spirally growing in males, forming the famous tusk that can reach up to 10 feet in length. Some males can have up to two tusks, while others lack them.
Un narval évoluant à travers les eaux glacées de l'Arctique émerge à la surface avec sa défense caractéristique
Un narval évoluant à travers les eaux glacées de l'Arctique émerge à la surface avec sa défense caractéristique © | Dreamstime.com
Only 15% of females have a tusk and it is much smaller.
Their skin is pale gray with white spots, allowing them to blend into the icy waters of the Arctic Ocean.
The narwhal reaches a length of 13 to 16 feet and weighs between 1,800 to 3,500 pounds when fully grown.
Geographic range
The narwhal is found in the cold waters of the Arctic ocean, primarily around Greenland, Canada, Russia and Iceland.
Habitat
The narwhal prefers deep, icy waters, where it moves between ice layers to feed and migrate. In winter, it often travels under the ice and surfaces through holes in the ice to breathe.
The narwhal is a social marine animal that lives in groups, typically composed of 5 to 10 individuals, but can sometimes gather in larger numbers during the summer season.
Diet
The narwhal is primarily carnivorous and feeds on fish such as halibut and cod, as well as cephalopods. In winter, it migrates to deeper areas to hunt and feed.
Reproduction
The narwhal’s reproduction is typically observed at the end of summer, with a gestation period of about 15 months. Females give birth to a single calf at a time, usually between July and August. The young narwhals are born with black skin that gradually lightens with age. Males reach sexual maturity at around 8 years, while females can reproduce from 5 to 7 years of age.
Did you know ?
The narwhal is known for its sophisticated communication behaviors, using clicks and whistles to interact with its peers in the dark waters of the Arctic Ocean.
The male's large tusk, often considered a symbol of status, remains a subject of research. Scientists have suggested that the tusk may play a role in male competition behaviors, particularly in fights to attract females, although the existence of violent battles has not been conclusively confirmed.
Narwhal populations are threatened by climate change, which is drastically altering their icy habitat, hunting, marine pollution and industrial activities in the Arctic, such as oil and gas exploitation.
Within the same family
Beluga (Delphinapterus leucas)
Beluga
(Delphinapterus leucas)
Discover also
Antarctic fur seal (Arctocephalus gazella)
Antarctic fur seal
(Arctocephalus gazella)
Dugong (Dugong dugon)
Dugong
(Dugong dugon)
Dwarf minke whale (Balaenoptera acutorostrata)
Dwarf minke whale
(Balaenoptera acutorostrata)
Gray whale (Eschrichtius robustus)
Gray whale
(Eschrichtius robustus)
Harbor seal (Phoca vitulina)
Harbor seal
(Phoca vitulina)
Rissos dolphin (Grampus griseus)
Rissos dolphin
(Grampus griseus)
Sperm whale (Physeter macrocephalus)
Sperm whale
(Physeter macrocephalus)
White headed dolphin (Cephalorhynchus hectori)
White headed dolphin
(Cephalorhynchus hectori)
The marine species from Arctic ocean
Adelie penguin (Pygoscelis adeliae)
Adelie penguin
(Pygoscelis adeliae)
Antarctic fur seal (Arctocephalus gazella)
Antarctic fur seal
(Arctocephalus gazella)
Chinstrap penguin (Pygoscelis antarcticus)
Chinstrap penguin
(Pygoscelis antarcticus)
Emperor penguin (Aptenodytes forsteri)
Emperor penguin
(Aptenodytes forsteri)
Gentoo penguin (Pygoscelis papua)
Gentoo penguin
(Pygoscelis papua)
Southern right whale (Eubalaena australis)
Southern right whale
(Eubalaena australis)

Our latestUpdates

The queen triggerfish
Tuesday, September 16th 2025
The queen triggerfish
Discover the queen triggerfish (Balistes vetula), a colorful Atlantic reef fish known for its strong jaws, unique feeding techniques and fascinating reproductive habits.
The bump-head sunfish
Friday, September 5th 2025
The bump-head sunfish
Learn about the bump-head sunfish (Mola alexandrini), the world's heaviest bony fish, its habitat in tropical and temperate oceans, diet of jellyfish, deep-water behavior and record size over 6,000 lbs.
The chocolate chip sea cucumber
Wednesday, September 3rd 2025
The chocolate chip sea cucumber
The chocolate chip sea cucumber has a massive cylindrical body that is beige in color, covered with a set of dark brown pustules resembling chocolate chips that protrude slightly from the surface, giving it a resemblance to a cookie, hence its french name. It can reach a length of about 12 inches when fully grown.
Photo of the Day
Baleine de minke naine (Balaenoptera acutorostrata)
Baleine de minke naine
(Balaenoptera acutorostrata)