Some people, especially after the sensational reports of shark attacks in the resorts of Egypt wondered: and it is safe for swimmers and divers water of the Black Sea?Do all sharks are found in the Black Sea, and whether it is possible to meet them on the coasts of the Caucasus and Crimea?
To fully answer this question and to reassure all sorts of trouble, you just need to make an excursion, albeit briefly, the history of occurrence of the water area, which is now called the Black Sea.10 million. Years ago there was a huge body of water, which scientists have named Sarmatskys sea.Gradually, with the growth of the Sarmatian Sea mountains divided into a number of large lakes, seas, cut off from the waters of the oceans: the Aral, Caspian and Black.The latter, due to the large number of rivers flowing into it, was desalinated.Over time, all the fauna that lives in the ancient Black Sea, the lake became fresh water.But 8 million. Years ago there was a huge earthquake forces that created the Sea of Marmara and the Bosphorus and Dardanelles straits and prove fatal to the then inhabitants of the Black Sea.The masses poured salt water from the Mediterranean to the Black Sea.The changes have been so rapid that freshwater marine inhabitants of the Black Sea did not have time to adapt to them.A huge number of dead bodies fallen to the bottom, and the process of decomposition of the Black Sea has exceptional, not like other sea: there was hydrogen sulphide layer, located less than 150 meters from the water's surface.
This layer of hydrogen sulfide does uninhabitable vast expanses of the Black Sea.Below 150 m can exist except sulfur anaerobic bacteria that his vital functions only increase the percentage of hydrogen sulphide.This circumstance - a narrow layer in which the fish is very tightens life of such large and dangerous predators like sharks in the Black Sea.But hydrogen sulfide - not the only factor that blocks the path of the sharks.A large number of rivers and narrow Bosphorus Strait significantly desalinate water of the sea.Suffice it to say that the salinity of the Black Sea is twice lower than the Mediterranean.In addition, the surface of the water in the winter can be cooled to + 9 With that inhabit cool, but not cold waters of the Atlantic, sharks are very uncomfortable.Unfit for sharks and meager food base of the Black Sea: large predators prefer larger prey and Stein, dwells in the depths of the waters, whereas the Black Sea is rich in small fish: anchovy, sprat, sardines, which live in the surface layers of water.
If we assume that any shark and zaplyvet summer from the Mediterranean to the Black Sea, it is unlikely that she will get away from the Bosphorus because of the unsuitability of the water and food scarcity.Yet the Sharks in the Black Sea is, and even as much as two types.But do not be scared!This spiny dogfish shark, also called dog-shark because of the similarity of the muzzle, and cat sharks.These two types of feed, as well as the Black Sea dolphins, small fish, moving in small flocks.People are not eating, though their mouths again, like dolphins, are full of teeth.But people are willing to eat these small sharks: steaks katrana considered a great delicacy in the Crimea, and salmon from katrana valued as well as salmon and sturgeon, as this fish has almost no bones, and its meat has excellent taste.
However uniquely discard shark danger in the Black Sea is still not: katrana have to have fin thorn that causes pain and can cause inflammation of the wounds.Though for katranov and cat sharks is not peculiar, sometimes they swim in shallow water, and they can just come.In this case, the fish can fright float and teeth.But this case was recorded only once in all the years of observations (in the 1970s on the beach Yevpatoria).The most dangerous animals to humans in the Black Sea - it was not sharks and stingrays.Their backs are not equipped with simple thorns and poisonous.A portion of the injected venom is not lethal to humans, but can seriously spoil his vacation, as the limb swells from the bite.There are cases of deaths (though not in the Black Sea) from hitting the spike in vital organs.But, in general, the Black Sea is considered the safest in comparison with others.
