appearance

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Sharks (lat. Selachimorpha) is a superorder of cartilaginous fish comprising eight teams, twenty families and about 350 species. Members of the superorder widely distributed in all seas and oceans, there are also freshwater sharks. Most species belong to the so-called real predators, some species, particularly whale, and giant deep-sea sharks, eat plankton.

For many millions of years before the planet appeared the first man, ruler of the prehistoric seas was a shark. The power of evolution sowed on Earth, countless forms of life that could not stand the severe tests and disappeared one after another, as the shark continued to exist. One prehistoric era is succeeded by another, have any amphibians, reptiles, birds, and mammals – the shark continued to exist. Pterodactyls – the winged reptile for millions of years plied the skies, disappeared from the face of the Earth. Dinosaurs-Triceratops, Brontosaurus, allosaurus and many other “saurus”, it is important chestvovali on our planet died out, leaving no trace. As the shark continued to exist.

About 20 million years ago in the sea scoured a huge Stingray, weighing over 100 pounds, and more than 25 different species of sharks, including sharks, reaching 36 meters in length. The length of these monstrous sharks was Opredelenie their huge teeth. Some of the teeth found in California, weighing 340 grams each and reach 15 centimeters in length, and seven – and ten teeth are quite common. They are triangular in shape and closer to the teeth of modern great white sharks that do not exceed 5-6 inches now with a body length of shark of 12 meters (maximum length). These teeth belonged to the ancestor of the modern great white shark the carcharodon, in huge quantities inhabited the seas. When they were first found in the seventeenth-century scientists, naturalists believed that this fossil bird tongues or teeth of serpents. They could not imagine that this shark’s teeth, and ascribed them to the mythical animal. Continue reading

Dangerous inhabitants…

The rest of the sea – the dream of almost every holiday maker! The Eastern part of Russia are used and forced to rest on the coast of the sea of Japan. It would seem that it can be dangerous in this region. However, on closer inspection, it was discovered the inhabitants, who simply need to know and to be particularly careful!

Let’s start with Yellow perch (trehpolosaya) — native of Japanese waters, it has quite a menacing look – the dorsal fin consists of 15 acute rays, the Gill slits are spikes, characteristic of the spotted-striped color…

Reach impressive sizes (up to half), but grow very slowly, reach sexual maturity at ten years of age! So what threat this slow instance of marine fauna? At the base of the spines on the fins and the Gill slits are poisonous mucous glands which secret, getting into the wound, causes a local and then a systemic poisoning of the body. Meeting with Yellow perch can seriously spoil your holiday by the sea. Symptoms: pain and inflammatory reaction, then, perhaps swollen lymph nodes. At the injury there is swelling, which could spread to the entire limb. Famous deaths.

In the injection – treatment of the wound with disinfectants and symptomatic treatment.

Further,it is worth mentioning jellyfish, let’s start with Lanei hairy . the largest jellyfish in the world, in the Guinness book of records registered the maximum size is 2.28 meters in diameter. So, typical signs: red umbrella (maybe raspberry or orange hue), the thickness of the umbrella is reduced to the edge, and the edge of the blade is transparent. The tentacle is quite long, divided into eight beams, form a kind of veil that protects the bodies underneath the umbrella. The hairy cyanea occurs in southern Primorye, mainly small individuals, in spring and early summer they gather in large clusters (up to one hundred meters of the field), there are instances of up to 60 centimeters… the Venom is contained in stinging cells on the tentacles, a single burn is not dangerous to humans, however with increasing dose of the poison received – there is a risk of allergic reactions. Continue reading

What sharks are the most dangerous?

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

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The squad catfishes
Atkritumu fish. One dorsal fin. Pelvic fins located on the belly. In the pectoral fins and in most species the dorsal fin is spiny, often jagged rays. Non-rising mouth surrounded…

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Presentation on theme
Sharks (lat. Selachimorpha) is a superorder of cartilaginous fish comprising eight teams, twenty families and about 350 species. Members of the superorder widely distributed in all seas and oceans, there…

Continue reading →

Interesting facts about fish
The main reasons for the popularity of clown fish among aquarists. The absence of teeth on the tongue and large oval black spots on the back - one of the…

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