It forages in all depths of the ocean, preying on benthic organisms in winter, especially flounder that live under thick ice. In summer, its main food is Arctic cod, flounder, and some other fish.

Narwhals breed during the winter, mating in underwater ice caves.

It was the coldest time, when the Arctic Circle was pitch black and the air temperature could drop to minus 51°C. The erosion of wind and ocean currents left gaps in the ice, allowing narwhals to swim to the surface for air.

Baby whales are born very strong.

An adult narwhal is about 12 feet long, weighs about 2,000 pounds, and is 1/3 the size of its mother. It is considered the largest baby among mammals.

Like beluga whales and Arctic right whales, narwhals are 50% fat; other whales have about 20% to 30% fat. No one has ever seen a narwhal eating underwater.

Scientists once studied the stomachs of 121 narwhals and found that they dieted in the summer and went crazy in the winter.

Because they like to eat halibut that live in the deep sea, narwhals are good at diving. According to trackers, they can dive to a depth of 1,800 meters.

Male narwhals compete with each other with their tusks. Whether in the water or on the sea, the sound they make is like two wooden sticks hitting each other.

Young male whales often play and fight, but rarely poke each other.

The strongest male whales usually have the longest and thickest tusks and can mate with more females.

Narwhals are often trapped in rapidly freezing ice. Instead of using their tusks, they use their heads to knock out the breathing holes they need.

When male whales come to the surface to breathe, tusks can occasionally be seen, but they are usually below the surface.

The social status of a narwhal is related to its tusks.

Groups of large male whales mostly stay in the offshore waters slightly farther from the shore than female whales or calf whales.

Most female whales do not have tusks.

The longest lifespan of a narwhal is about 50 years.

1.5-1.7 meters at birth, 3.8-5 meters at adults.

The birth weight is 80 kg and the adult weight is 0.8-1.6 metric tons.

All narwhals have two teeth in the upper jaw.

When a male narwhal turns one year old, his left tooth begins to grow outward in a spiral shape.

This long tooth can grow to 7 to 10 feet (2 to 3 meters) long, twisting in a counterclockwise direction, and the inside of the tooth is hollow.

The purpose of this tooth is uncertain, but it may have been used as a jousting weapon in courtship and competition for dominance, to retrieve food, or to navigate and amplify the sonar vibrations they emitted.

The tusks are not used for hunting.

Usually there are groups of 1 to 25 animals, but there are also cases where hundreds or even thousands of animals swim together.

"Groups" consist of a mixture of animals, but are generally segregated by age and sex.

Female whales and calves often form groups, while calves or adult males often form individual organizations.

Hundreds of small groups may gather together to swim together, and thousands of narwhals may be spread over several square kilometers at this time; gender segregation is most obvious in large groups during the autumn migration.

When male whales float to the surface to breathe, tusks can occasionally be seen, but they are usually below the surface; the social status of a narwhal is related to the length of its tusks.

Groups of large male whales mostly stay in the sea farther from the shore than female whales or calf whales.