An inhabitant of the oceans - a fish-saw

Fish-saw (piloryl common) belongs to the family of cartilaginous fish from the skate racket. She gained fame due to her appearance. Up to now, only 7 kinds of saw logs have survived: Atlantic, green, small-toothed, European, Asian, Australian, comb. The fish-saw has an elongated body similar to a shark, on which there are 2 fins on each side and 2 triangular fins on the back. There are species in which the tail part merges with the trunk, and is - with a tail fin divided into 2 parts. The pylorilla skin, like that of a shark, is covered with placoid scales. It has different shades of olive-gray in different species. The belly is practically white. Pictures of fish-saws well demonstrate its main advantage - a flat and long build-up on the snout in the form of a saw.

Quite often sawlings are confused with one of the sharks, namely with pylonos. This is not true, although sharks are among the closest relatives of skates. The last gills are located below, while the sharks are on the sides. In addition, the ramps are larger in size. In general, they reach from 4 to 5 meters in length, but there are also seven-meter specimens. A pylon shark rarely grows more than 1.5 meters. On one of the presented photos of a saw-fish, its belly is clearly visible, on which the mouth opening and pair of gills resemble a whiny face.

Pilorid stingra belong to the egg-living species of fish. In other words, their cub is born already formed, but in the shell of a leathery egg. A female can give birth to up to 20 babies at once. At the same time, the saw in their mother's womb is completely covered with skin, at birth it is soft, and hardens only with time.

Inhabits the fish-saw in all the oceans, except the Arctic. Its favorite place is the coastal waters, it practically does not occur in the open ocean. Quite often he likes to bask in shallow water, and on such that her dorsal fins are clearly visible above the water. Along the coast of Australia, of 5 species, 5 live, and in general, the Australian sawmill has long been accustomed to freshwater waters, where it lives, not swim out into the ocean. In general, all kinds of these skates feel great both in salty ocean water, and in brackish and freshwater environments. The only place where they can not live is water contaminated with waste. During seasonal migrations, the fish-saw can safely swim in large rivers, it occurs in summer and autumn.

It feeds on this type of stingrays by invertebrate benthic animals that live in the silt covering the bottom or sand. And it is for the loosening of the bottom soil that the sawmill needs its saw. Although there is evidence that he uses his saw not only as a shovel. He can rush in, for example, into a flock of mullet and wave with his build-up like a saber, hitting the prey at the same time. And when it sinks to the bottom, piloryl quietly eats it there.

It is generally believed that the fish-saw is not dangerous to humans. But still there were several cases of attack. In the Panama Bay, even cases with a fatal outcome are recorded. Although if it is not provoked, that is, do not tease or attack it, then most likely it will simply try to hide when approaching a person. And those who like to walk in the shallow waters of the ocean, you need to know that the rays like to bask in the sun. Take this into account and try not to step on one of them. And if we talk about harm, then a person, polluting the water, does more damage to it. You should know that some types of sawfishes are already on the verge of extinction, they are listed in the Red Book. And recently the total number of these skates has sharply decreased. Very few people can boast of having seen a saw-fish in its natural habitat.