Two types exist in nature: pond and river. These species have noticeable differences from each other. First, pond carp has darker scales, and secondly, larger rivers, broader and also has a kind of hump, that is, a pronounced transition from the back to the head. Moreover, all States that pond look thicker and movable, produced significantly more offspring, and river a brother on the contrary is cunning, so to talk about fish. By the way, it should be noted that river and much faster growing, and are considered to be stronger. Pond carp is not just a certain fish.
These individuals have different forms and scales. The last species is considered the most beautiful of all. It is covered with scales of Golden hue, tall and long body, a broad fin on the back gray. Has a large caudal fin brownish, and the lower fins are mostly grey, less common purple. Eyes also differ in color Golden and black pupils. It is a bit like carp, but You will immediately see the difference, because on the lips of carp has a small mustache, and the body is longer in contrast all from the same carp.
In his pharynx has pharyngeal teeth, five on each side, katariinankatu carp for grinding the food. If You caught the lighter an individual, then it is a young fish that are not yet fully formed. The young differs in having a more hump back, a little skinny. Continue reading
The shark is a collective name. There is a white shark, blue, tiger, cat, soup, mackerel, shark-Fox, nurse shark, hammerhead shark. Scientists consider 350 species of these fish. And only 27 of them are accused of attacks on humans. And a few that occur only once.
There are very small sharks the size of a pencil and weighing about 200 grams, and there are huge – up to 20 metres in length. The weight of these giants reaches 20 tons.
The biggest sharks – two species of whale and a giant, never attacking the person. They feed on plankton and small fish, straining out the water through thousands of tiny teeth. Aggressive and dangerous is the white shark. It reaches 5 – 6 metres long, rarely up to 12. But the white shark is a rare fish.
How often do sharks attack people. No, rarely. However, over the last 50 years such cases have become frequent. This is due to the emergence of a large number of sea divers, who, not knowing the habits of sharks and not knowing how to handle them, by their conduct provoke their attack. Actually sharks are scary little shits. People they fear and try to stay away from them. So says the expert on the biology and behavior of these fish American scientist, Professor Eugene Clark, who throughout his life devoted himself to the study of sharks. Many times she put on scuba gear, descended into the sea and swam with the sharks. Watched them day and night and also in the Oceanarium. Continue reading