The polar shark belongs to cartilaginous fish, which science has not studied very well. There is very little official information about this species.
This is due to the fact that polar sharks live in harsh waters, and also at a considerable depth.
These predators are found in the White Sea, in the southern waters of the Caves and Barents Seas. Some individuals migrate further east and end up in the Kara Sea. Polar sharks are often found off the coast of Greenland, Norway and Iceland. In addition, representatives of the species live in the Hudson Strait and the Baffin Sea.Greenland polar shark (Somniosus microcephalus).
In terms of size, these cartilaginous fish are practically inferior to white sharks. The body length of the polar shark varies between 6.5-7 meters.
Individuals weigh about a ton, but there are specimens whose weight reaches 2 tons. The average length of the polar shark is 3-4 meters, and the average weight is 800 kilograms.
If we talk about aggressiveness, then these sharks are significantly inferior to their counterparts. The body of the polar shark has a perfectly streamlined shape resembling a torpedo.Antarctic polar shark (Somnisious antarcticus).
Color can be brown or dark green. The whole body is covered with small spots of black and purple. The head, in comparison with the size of the whole body, is not large. The jaws are wide. The teeth on the upper and lower jaw differ. In the upper jaw they are sharp and sparse, and in the lower jaw they have a blunt square shape and are planted much thicker. The caudal fin has an asymmetric shape: its upper part is much larger than the lower.
Shark behavior and nutrition
In summer, these predators prefer to stay at great depths - about 500-1000 meters. At this depth, sharks prey on invertebrates and fish. In addition, carrion is included in the diet: corpses of walruses, seals, whales.Polar sharks do not attack large animals.
No cases of polar shark attacks on large mammals have been recorded. These predators are too slow, and also cowardly, therefore they do not come into battle with more hardy and strong animals. Also, in the history of cases of polar shark attacks on humans.
In winter, these predatory fish rise from the depths to the upper layers of the water. In this case, the diet of the predator remains unchanged. During this period, polar sharks become available for fishing.Polar sharks are inhabitants of cold northern waters.
Reproduction and longevity
The breeding season is in the spring. Polar sharks lay several hundred eggs in depth. The eggs are quite large, their length is about 8 centimeters, they have an oval shape. Eggs do not have a protective cornea.
The life expectancy of polar sharks is approximately 400-500 years, while females live on average 10 years longer than males.The main enemy of the polar shark is man.
Enemies of the polar shark
The most basic and probably the only enemy of the polar shark is man. This fish has a very large liver, it is because of the liver that these fish are caught. Technical fat is made from it. The meat of the polar sharks is poisonous. This is due to the fact that they do not have a bladder and urinary canal, and all body waste is excreted through the skin.
But local peoples, constantly hunting for polar sharks, have learned to eat their meat. They pre-soak it, then boiling it in several waters, after which it becomes edible. Raw meat is very unpleasant in taste and has a pronounced alcoholic effect.