In our minds firmly strengthened the claim that sharks are dangerous predators and ruthless killers.However, this description does not apply to katran shark, which lives in the Black Sea and the rest not attack.
spiny dogfish shark belongs to the family of prickly squad katranobraznyh (dog) sharks.It has a large area spread across the seas of the oceans, particularly in the Black Sea.Shark tries to avoid too warm or too cold water.Usually katran kept at a depth of 100-200 meters and near the coast, it rises to the surface only at night.Typically, the fish does not make too distant migrations.Katrana autumn migration begins in the areas of mass gatherings horse mackerel and anchovy.
spiny dogfish shark, also known as spiny dogfish, is a medium-sized predator and the only shark Black Sea.High resolution it is different, its length ranges from 70 to 125 centimeters.Pretty rare specimen the size of two meters.Weight predator averaging 10-12 kilograms.Katran has a well-developed sense of smell, and the shark almost does not feel pain.
Black Sea shark spiny dogfish has the same appearance, as well as other representatives of her group: the light color on the belly, dark - on the back and sides, slender spindle-shaped structure of the body, conical head with a crescent mouth.A distinctive feature of the outer prickly shark is the lack of anal and nictitating eye membrane - the "third age".
Katran - shark, which is not a serious threat to human life on the Black Sea coast.The only danger to humans is the ability to hurt spiny-finned fish.Special placoid scales that covers the skin of a shark, is similar in composition to the teeth and bones.Thus, shark scale consists of leather plates which are adjacent to each other and form a pointed top.Shark has sharp and poisonous thorns, covered with slime, but the venom is not deadly katrana.Katran is small and multi-sharp teeth, which are updated throughout life.They gradually fall out and are replaced by new ones.
spiny dogfish shark is the largest predator of the Black Sea.The main food of the young katrana are small fish fry and shrimp.For adults favorite food - herring, cod, mackerel and squid and even octopuses.Lifespan katrana a long time - 25 years.Hunts spiny dogfish in small flocks, following the accumulation of fish.
spiny dogfish shark - fish Viviparous, females give birth to about 14 sharks that appear fully formed and ready for independent existence.Their weight - 40-50 grams.For one year akulyata grow up to 35 centimeters.Full sexual maturity is achieved in 13-17 years.
spiny dogfish shark fishermen often creates trouble eating their catch and destroying tackle, but vacationers are not attacked.Sea Dog is a valuable commercial fish and healthy food.Meat, liver and cartilage fish contain large amounts of valuable substances for the body, contributing to its recovery.Its meat has a pleasant taste and delicate texture, contains about 12% fat.Especially valuable livers of fish, of which produce medical fat has vitamins A and D.
