18 amazing facts about sharks

18 amazing facts about sharks

Of course, the idea to swim with the sharks may seem scary and unpleasant, nevertheless there are many interesting things you don’t know about them.

18 amazing facts about sharks 1. In the world there are about 500 species of sharks, which differ in size, shape, habitat, and nutrition.

18 amazing facts about sharks - Dwarf Lantern Shark 2. As it has been already mentioned, the sharks come in different sizes. There are those that can fit in your hand, such as the pygmy shark and there is a shark, which can fit several people at once – for example, the whale shark, measuring up to 12 m in length.

18 amazing facts about sharks - saw shark 3. There is a kind of angel shark-like rays (the shark family). The feature of saw shark – sharp nose, the which length can reach the size of the shark body.

18 amazing facts about sharks - depth sharks 4. Sharks are found at different depths – in the shallows, in estuaries, and at a depth of about 3000 m.

18 amazing facts about sharks - Goblin shark 5. Deep goblin shark or the goblin shark is the oldest existing species among sharks. They belong to the white shark, thresher shark and isurus.

18 amazing facts about sharks - ancient shark 6. The first sharks appeared 400 or 455 million years ago, but modern sharks with flexible cartilage skeletons almost did not survive.

18 amazing facts about sharks - ancient shark skeleton 7. Petrified serrated scales, which once covered the body of a shark are the most ancient evidence of the appearance of the shark species.

18 amazing facts about sharks - shark teeth 8. Only a few things really make shark a shark. All sharks have a fresh jawbone and the number of gills, and, unlike most other fish species, sharks skeleton is cartilage rather than bone.

18 amazing facts about sharks -  fatty liver for buoyancy 9. In contrast to the bony fish, sharks have no swim bladder. They use their large fatty liver for buoyancy.

18 amazing facts about sharks - white shark 10. Most of the sharks as well as other fish are cold-blooded, but some – warm-blooded, including the white shark.

18 amazing facts about sharks - huge white shark 11. Having a higher body temperature than the temperature of water makes these animals develop different velocity. They grow faster, swim faster and hunt more efficiently. In exchange, they have to eat 10 times more likely than other cold-blooded fellows of similar size.

18 amazing facts about sharks - hammer shark 12. Surprisingly, sharks do not become angry near food. They are relaxed and their eyes almost do not rotate.

18 amazing facts about sharks - shark eyes 13. In the movie “Jaws” stated that the lifeless black eyes when shark bites are white.

18 amazing facts about sharks - white shark wallpaper 14. This is partly true. But only some species, including the white shark, use eye rotation to protect eyes. Others protect their eyesight by the third eyelid, called the nictitating membrane.

18 amazing facts about sharks - whale sharks 15. Many etymologists believe that the word ‘shark’ can be borrowed from the Dutch language. It was used to refer to dodgy people. This connection can still be seen in the phrase “shark business.”

18 amazing facts about sharks - Carcharocles megalodon teeth 16. Carcharocles megalodon is the longest form of a shark, the size of 15 m, which lived 2.6 million years ago.

18 amazing facts about sharks (3) 17. There is a myth that sharks do not get cancer. This, of course, is not true. Reverse it became known in 1908, when the blue shark malignant tumor was discovered.

18 amazing facts about sharks - killing sharks 18. 100 million sharks are killed due to finning. The fishermen cut off the fins, sold as a delicacy, and a wounded animal thrown back into the ocean to die. It reduces the number of sharks and disrupted the food chain.

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