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The shark brownie represents very strange being with extremely long flattened snout which sideways has an appearance of the pointed wedge. A mouth at this shark sliding, and jaws when they are exposed forward, gain similarity to a beak. Back fins at it small, considerably inferior by the sizes to the anal. Tail fin long. The body is painted in gray-brown color.

In certain cases the sea fox acts with a tail fin as tsepy, applying it to devocalization of the victim. Fish happens such victim not always. Observed, in particular, as the shark attacked this way of the sea birds sitting on a water surface. The direct shot a tail — and the developed shark is enough not absolutely usual production.

At a boundary of XIX and XX centuries, for example, only in waters of Greenland got to 30 thousand these sharks annually. It is interesting to note that, despite the sizes and force, the polar shark caught on a hook, even the largest, absolutely

cases of instant appearance of sharks about the harpooned whales who are bleeding profusely near the fishes hit when spearfishing, the scared swimmer who near is awkwardly floundering in water. Sight at sharks is developed quite poorly, an eye has small resolution and due to the lack of flasks in a retina is not capable to distinguish colors.

Thus there is a hypertension of band liquids in relation to environment. Due to this feature fresh meat of sharks, as a rule, has not especially pleasant specific smell which disappears at the corresponding culinary processing. Process of reproduction of the plastinozhaberny is characterized by specific features.

2 sorts differing with number of branchiate cracks belong to family of the pilonosy (5 or and the including about 4 types It is the medium-sized sharks living in warm waters of the western part of Silent and Indian oceans. In our waters they do not meet, but in the southern part

Atlantic, Indian and Silent oceans. This look differs in very peculiar way of food. Despite the small sizes, the shark safely attacks tunas and sharks, and also squids, dolphins, whales and takes a bite pieces of skin and meat, leaving on a body of the victims characteristic round scars. Such marks were found even on a cover of the American submarines.

The Pilovidny snout gives to these sharks a strong likeness with the fish saw belonging to group of the skatoobrazny. Nevertheless belonging of pilonos to sharks is quite obvious thanks to such signs as the provision of branchiate cracks on sides and existence of the free chest fins which did not grow together with a body.

Reproduction happens in the spring at a considerable depth. At this time the female postpones directly in water about 500 soft ellipsoidal eggs deprived of a horn capsule and there is enough large — they have length about 8 cm. The polar shark has trade value in the Barents Sea, and also at coast of Norway, Iceland and Greenland, but modern trade considerably decreased (in connection with reduction demand that took place last century.

The Sea of Japan, at coast of Korea and Japan, the Japanese shark-pilonos (Pnstiophorus japomcus) is known. This sluggish ground fish eats small fishes and small bentosny animals whom she digs out

Classification modern plastinozhaberny which about 700 types are now, is based generally on signs of an external structure and some features of anatomy. Usually allocate two big groups — sharks (Selachomorpha) and slopes (Batomorpha).

The second sort of this family — seldevy sharks, or lamna (Lamna) — contains two look. Seldevy sharks — typical inhabitants pelagiat. Their body from above is painted in dirty-blue or gray color, a belly white. At these sharks thin smooth teeth have smooth edges and additional cloves at the basis.

long and persistent resistance to the fisherman. It is interesting to note that a shark-mako, record on weight (357 to it was caught on a spinning by the well-known American writer Ernest Hemingway, the big fan of sports fishery.

It meets both at the open ocean, and near coast and keeps usually in water blankets, making sometimes jumps over a surface. The usual food of a sea fox is made by various gregarious fishes and squids whom she devours in a large number. In a stomach of one copy, about 4 m long, 27 large mackerels were found, for example.