In the Black Sea spiny dogfish lives katran. In contrast to their ferocious female relatives – white and blue sharks – katran not attack people. This is a relatively small shark with a body length of about one meter. Only a few representatives and legs grow longer, yes, but not more than two meters. The body is painted in katranov gray-green color. These fish are kept in flocks.
Food they serve a variety of fish (herring, cod, mackerel, gobies), shrimp, crab, octopus and squid. Dorsal fins have katrana two. In front of each of them has one long sharp thorns poisonous. They fish hurt anyone gives her trouble. Danger to human katran is not only If the person does not take his hands. The wounds from shots katrana deep and very painful but not lethal to humans.
The poison is only in the thorns shark and its meat is not poisonous. For the sake of it caught them in large quantities. Fishermen even catch the bait. More dangerous for a man of another resident of the Black Sea – a sea dragon. This little fish is about 35 cm long lives at the bottom, often buried in the ground, exposing the surface of the head and dorsal spines fin. Outwardly similar to the dragon goby. He has an elongated body, flat belly, large head with bulging eyes. As with katrana, the dragon two dorsal fins. The first dorsal fin black, the other – yellow. When fish sits buried in the sand, its black fins, as beacon, clearly visible from a distance. He seemed to notice that the dragon is dangerous to approach. That black plavnichok – the most terrible weapons of this fish. It is a poison that the strength is the most dangerous poison of snakes. People who taunt these fish are experiencing severe pain. They can not tolerate, much shouting and rushing about in desperation. Affected area becomes inflamed, swells strongly. In humans, quickens the pulse, the heartbeat is disturbed, there are fever, vomiting and difficulty breathing. For a complete cure is necessary for several months. If assistance is not provided in time, the person may lose consciousness and even die. There are many more interesting things about the fish and not only on.