About the brutality of the sharks is legendary. People since ancient times afraid of sharks, because sharks of any size can be dangerous. However, among all the sharks you can highlight a dozen of the most dangerous, which can end badly.
Sharks are dangerous not only because they are strong, have sharp teeth and powerful jaws. The main danger lies in the unpredictability of the behavior of toothy predators: despite the fact that the habits of sharks are being studied for a long time, to predict with accuracy how the shark in any given situation, almost impossible.
Dangerous shark species
Today there are more than 450 species of sharks of different sizes, the smallest can reach a length of 17 cm, the biggest is up to 20 meters. But the real danger to humans represent only some species of sharks. Recent years have witnessed the most attacks on humans great white, bull and tiger sharks.
Great white shark
This shark is called “great”: in length it can reach up to 7 meters and weight up to three tons. The mere sight of this blood-thirsty predator is able to inspire terror. If you watched the movie “Jaws”, then you understand what is involved. The reputation of the great white shark is the most grim: in 2012, the year its victims were 11 people, three cases ended in the death of the victims. Continue reading
Aquarium fish, by definition, live and breed in the aquarium. For the most part, people have fish for decoration, but in some cases they are specially bred for sale. Ornamental fish in natural conditions live in subtropical and tropical fresh waters, and obliges the owner of the aquarium to maintain appropriate habitat conditions with a high temperature water environment.
Many aquarium fish have odd shapes, small sizes and bright colors, for which they are highly appreciated in the decorative plan. The most popular are goldfish, which as if came to us from the famous fairy tale. In the Russian realities aquarium fish is ecosublime, Cypriniformes and Perciformes orders. Well, most often in aquariums of our residents can meet angelfish, barbs, catfish and nannostomusy.
If you are new to the aquarium thing, we might think that fish is an extremely stupid water creatures. In fact, they are bought only for beauty and decoration, so the mind is required. Moreover, some people consider fish not as living beings but as a real decorative object. Only with time come to them the idea that in the aquarium swim real Pets, for which poznavatelnoe very interesting to watch. Aquarium fish are often attracted to genetic research, resulting in new and very beautiful variety.
To do fish, you can not only adults but also children. For the latter category is especially useful, since communication with aquatic animals, develops psychological comfort and establishes emotional contact. Simultaneously, children develop skills and a sense of responsibility. Fish can even be affected person on a physiological level. In the process of monitoring the normalization of blood pressure, disappears stress, calms heart. Continue reading
Goldfish – Telescope (moor Carassius auratus) is an ornamental aquarium fish of the Carp family (Cyprinidae). This fish is also called depakinom and a water dragon. The telescope is one of the forms of the goldfish (Carasius auratus), bred through long selection.
The fish – telescopes bulbous rounded body. Its height more than half length of body. The fish have lengthened (up to ¾ of body length) two-bladed tail fin hanging down. The fin on the back stands upright. All other fins – long veil. The name telescope fish was at its largest (about 2 cm), protruding (bulging) eyes. The diameter of the eyes of the instances that took in Shanghai, up to 5 cm Fish – telescopes differ in the length and shape of the fins, color, presence or absence of scales and many others. Telescopes with a tail fin similar to a skirt, usually called a skirt, but if the tail is in the shape of ribbons — strip telescopes. More widespread telescopes, whose velvet-black color of the body, beautiful elongated fins and a forked caudal fin. The height of the body of the fish is equal to ¾ of its length. The black body of the telescope is covered with scales, which is in straight rows.
Telescopes that have symmetrical black and white color are called pandas, but if the torso is painted white, and panicipant black — billed magpie. Distinguished several types of telescopes, depending on the size, shape, and directions of the axes of the eye. Your eyes basically are: disc, spherical, spherical, conical and cylindrical. The eyes should be symmetrical and the same size. The fish, in which the axis of the eye is directed upward, is called the heavenly eye or the stargazers. Such fish is a separate species. Stargazers have a small long forked tail, and lack of dorsal fin. Continue reading