Narwhal

Narwhal at a glance

Need to know

• The narwhal’s spiral tusk is actually an elongated upper left canine tooth.
• Narwhals are exclusively found in Arctic marine waters and rarely venture south of the Arctic Circle.
• Their tusks can grow up to 3 meters (nearly 10 feet) long.
• Narwhals lack a dorsal fin, an adaptation for swimming under ice.
• They can dive to depths of over 1,800 meters (5,900 feet) in search of food.
• Narwhals are closely related to beluga whales, both being in the family Monodontidae.

About the Narwhal

The narwhal (Monodon monoceros) is an Arctic whale renowned for the long, helical tusk projecting from the males' heads, which has inspired unicorn legends for centuries. They inhabit some of the world’s harshest and most remote marine environments—often among shifting sea ice in the far north.

Narwhals play a key role in Arctic ecosystems as both predators and prey. Their mysterious behaviors, social lifestyle, and vulnerability to climate change have made them an important subject of zoological and conservation research.

Physical characteristics

Size: 3.8–5.5 meters (12.5–18 feet) long. Weight: 800–1,600 kg (1,760–3,530 lbs). Lifespan: Average 40 years, maximum up to 90 years.

• Single, long, spiral tusk (up to 3 meters long) in males
• No dorsal fin; ridge along the back
• Spotted gray/black patterning
• Short, round head with a slightly upturned mouth

Notable species

• Narwhal (Monodon monoceros) — Near Threatened. Arctic offshore deep waters, often near pack ice edges and coastal fjords Regions: Baffin Bay, Davis Strait, Greenland Sea, Canadian Arctic Archipelago, waters off Svalbard, Hudson Bay, Labrador Sea.

Habitat and range

Original range: Ice-covered Arctic waters including North Atlantic sectors of the Arctic Ocean and coastal fjords.

Current distribution: Narwhals remain circumpolar within the high Arctic, mostly around Greenland, Eastern Canada, and the Eurasian Arctic.

Preferred environments: Deep offshore Arctic waters, Pack ice edges, Glacial fjords, Shallow bays and estuaries (seasonally)

Regions: Baffin Bay, Davis Strait, Labrador Sea, Greenland Sea, Canadian Arctic Archipelago, Hudson Bay, waters off Svalbard

Where to see Narwhal

• Baffin Bay (between Canada and Greenland) — June–August. Summer ice melt attracts narwhals to coastal fjords and shallow waters for calving and feeding.
• Nunavut coastal fjords (Canada) — June–July. Best chance to view narwhals during their migration closer to shore, often by boat with Inuit guides.
• East Greenland fjords — July–August. Narwhals gather in relatively ice-free waters off Greenland's east coast; accessible by guided Arctic expeditions.

Behavior and diet

Diet: Narwhals primarily feed on Greenland halibut, Arctic cod, cuttlefish, shrimp, and squid.

Social structure: Narwhals are highly social and usually found in pods of 5–20, though larger aggregations of several hundred occur during summer migrations.

Communication: They communicate using a variety of clicks, whistles, trills, and pulsed calls, as well as physical contact.

• Deep diving to over 1,500 meters to catch prey
• Rubbing tusks in behavior called tusking, possibly for social or sensory reasons
• Seasonal large-scale migrations following ice-edge changes
• Ice-edge breathing: using cracks in sea ice to breathe

Interactions with other animals

• Polar Bear (predator): Polar bears prey on narwhals when they surface in small ice leads to breathe.
• Orca (Killer Whale) (predator): Orcas occasionally hunt and kill narwhals, especially in open water.
• Beluga Whale (sympatric): Narwhals and belugas are close relatives that sometimes share Arctic habitats, but have different diets and social structures.

Conservation

IUCN Red List status: Near Threatened

Threats

• Climate change causing loss of sea ice habitat
• Increased shipping and industrial activities in the Arctic
• Subsistence hunting by Indigenous peoples
• Entanglement in fishing gear
• Potential pollutants/toxic contamination

Conservation efforts

• International management agreements for sustainable indigenous hunting
• Ongoing population monitoring
• Protected areas in core Arctic habitats
• Collaboration with Inuit communities for wildlife management

How to help

• Support responsible climate policy to fight Arctic warming
• Avoid products sourced unsustainably from the Arctic region
• Support organizations funding Arctic marine mammal research
• Raise awareness about Arctic conservation issues

Narwhal facts for kids

Narwhals are unique whales from the icy Arctic, famous for their long, spiral tusks that look like unicorn horns! They swim in groups, dive deep for fish, and live where there is lots of sea ice.

• Narwhals' tusks can grow as long as a broom!
• They like to spend summer in cool Arctic fjords and bays.
• Narwhals don't have a fin on their backs.
• They can dive deeper than almost any other whale.
• Some narwhals have two tusks—like a double unicorn!

Did you know? Did you know that a narwhal's tusk is actually a giant tooth that grows through its upper lip?

Watch & learn

• The Secret Life of Narwhals - Arctic Unicorns — BBC Earth. A beautifully shot segment exploring the lives, behaviors, and unique adaptations of narwhals in the Arctic, featuring stunning underwater footage and expert commentary.
• Narwhal: The Tusked Whale of the Arctic — National Geographic. This documentary dives deep into the fascinating world of narwhals, focusing on their biology, mysterious tusks, and the challenges they face from climate change.
• Narwhals: Unicorns of the Sea - Science & Survival — Smithsonian Channel. Examines the latest research on narwhals, including exclusive footage of their migration and feeding habits, and interviews with marine biologists working in the Arctic.
• Into the Icy Realm of Narwhals — PBS Nature. An engaging look at Narwhals, highlighting their social structure and interactions with other Arctic wildlife, supported by expert narration and vivid visuals.
• Narwhals: Inside the Mysterious Lives of Arctic Whales — Nature on PBS. Highlights new discoveries about narwhal communication, migration routes, and their iconic tusks, all filmed in remote, ice-bound regions.