Sharks can be found in every ocean, in every sea of the world and even in some rivers. All of them , there are about 450 species. Some long reach up to 20 inches, others up to 20 meters. Some members of the species swim at a depth of over two kilometers.
Thanks to the artistic books and films, the popularity of shark such as white, tiger and hammerhead.
However, there are some which are known not so much because they are rare. Here are some of these amazing sharks.
The shark is the pygmy (dwarf)
The shark is the pygmy (dwarf) is the smallest representative of the family. Its length reaches 20-25 cm, painted black. She lives in the warm waters of two oceans – Indian and Pacific. It can only be found away from the coast. The day is in deep water, and at night rises closer to the surface of the water.
The diet of sharks pygmy are cephalopods squid. Is asciiportal, and the length of the smallest sharks reaching up to 6 centimeters. Lower torso is covered with a photovore – the authority, through which it glows. Once was the case that night when the sailors saw this fish at a distance of 15 metres.
The frilled shark
The frilled shark is one of the most ancient and rare fish. Some call it a “living fossil” and “the king of the underwater world”. She lives mainly in the warm waters of the Atlantic ocean at a depth of 1570 meters. Externally, the frilled shark resembles an eel or a sea snake. She reaches up to two meters in length and has a brown color. Tail fin of one of the blade. The jaws of this fish are located at the end of the snout.
In the jaw about 300 teeth. They are hooked and sharp, something like a crown. Eats cephalopods, small bony fishes. During the hunt the shark bends its body, then shoots forward. Even swallows large prey whole.
An interesting fact is that during pregnancy it can last up to 3.5 years. To date, the frilled shark is poorly understood. Only in a few cases managed to get her alive from the water. One of the last recorded cases occurred in 2007, near Japan. It was found by a fisherman on the water surface. But, unfortunately, she was sick and died a few hours later.
Pelagic largemouth shark
One of the rarest species of sharks is pelagic largemouth. It is the only species in its family. First saw her in 1976, near the island of Oahu. This fish was caught by the American research vessel. Having large sizes, a shark for a long time coexisted with humans incognito. It is possible, the locals took it for a sea monster, which formed the basis of some legends.
In 2004, on the shore near the city of Ichihara (Japan) found a female with a length of 5.6 meters. It was the largest representative of its species, which failed to see. By January 2015 was revealed only 60 individuals, which makes it not only rare, but also poorly understood shark.
Ballarat lives up to its name. This fish has a disproportionately large head and a huge mouth. The back is dark-grey colour, and the abdominal portion of the light. Despite the impressive size, a shark feeds on zooplankton – small aquatic animals. Habitat bollerot is difficult to determine, but it is most often found near the coast of California and Japan. By day, he descends to a depth of 120-160 metres, and at night rises up to 12 meters to the water surface.
Because pelagic largemouth shark is a planktivorous predator, the threat to humans is not. Unfortunately, some sharks are becoming rare and are in the red book.
