The fish looked like a giant underwater bats have been listed in the list of animal species vulnerable. According to the International Union for Conservation of Nature, giant stingrays are now pretty much caught for use in traditional Chinese medicine. Besides, most of them living area located on the shipping route. So the risk of bumping into the huge vessel- amazing science facts

Many people believe that giant stingray species "devil fish" because of the shape and the size of them. In fact, they are harmless to humans. Giant Stingray ratio between the brain and the body highest in fish, more sharks. They reproduce very little, each group is laying just 1.2 children.

Thanks to technology tracking via satellite, information about the movement of giant manta rays are recorded. From there the conservation of marine animals can detect threats in time affect their life.

But beside that person is feared dead, but very much about sharks that you may not know about:

1. A whale sharks can weigh in 18,000 tigers piranha fish.

2. The ancestors of sharks appeared 400 million years ago, that is 200 million years earlier than dinosaurs. That means that when dinosaurs dominated the earth, roaring and then become extinct because of climate change, the shark still exists cavalier under their underworld.

3. Sharks can swim at speeds of up to 60km / h. Meanwhile, the average rate of the pool is only 4km/hour.

4. Sharks no bones. Ministry "bones" of it composed of cartilage. Since no ribs so if they leave the water, the body weight of the shark can crush the internal organs before they suffocate.

Sharks 6. killer of all killers, synonymous with no natural enemies stronger than them and destroy them, except for people with advanced weaponry. May the shark only respect for each killer whale.

7. An average of 60 shark attacks per year who are recognized. Few of them fatal. Whereas, up to 70 million sharks are caught and killed each year by sharks hunting ships.

8. shark skin elasticity and durability 4 times cowhide. Sharks can sense changes in habitat due to border agencies (neuromasts) located just under the skin, distributed along the body, and especially a lot in the beginning. The function of the agency is to help sharks border feel the pressure and movement of water.

9. Sharks can sense electromagnetic fields. Some agencies specialize lateral line is to sense electromagnetic. We recognize the difference in voltage between the shark body to the environment. Scientists think this may allow sharks detect prey as well as foes, and mates. Ability to sense electromagnetic sharks can also help identify the Earth's magnetic field, helping them determine the direction they migrated.

11. It has been discovered many strange objects inside the stomach of a shark as an armor, wine bottles ... That shows sometimes sharks will swallow it and grab objects are, rather because crushes everything in its killer teeth.

12. Most of shark fins 8. Sharks can swim only to avoid the physical difference lies just in front of them, by the shark fin does not allow us to move backwards.

13. Sharks can be hypnotized. Sharks may fall into a natural state of paralysis. Researchers can cause this situation if shark's stomach flip up or rub the snout, depending on the species.

14. Sharks have sensitive hearing and taste amazing. They can smell blood in the water from doing so 1.5km. Shark nose can detect the time lag of smell to one nostril versus the other. We used it as a way to recognize the direction prey and turned to first detect odors.

15. Many species of sharks are color-blind. Animal's eyes have two types of cells respond to different lighting rod cells and cone cells. The rod cells determine the brightness of the control cones colors. A study of 17 different shark species indicate that although they may see different degrees of light, but can only see a single color is green.

16. So far detected more than 400 shark species.

17. Sharks are pregnant animals, which means they need a continuous flow of water through the gills to get oxygen. Continuous path is the way to have regular flow of water through the gills. But all animals need rest. Some sharks have special bodies called spiracles behind eyes that pump water through their gills, even when they are standing still.

The Allis Shad Fish (Alosa alosa (Linnaeus)) and the Twaite Shad Fish (Alosa fallax (Lacepede)), are both members of the herring family, Clupeidae. Interesting animal facts, this species of fish form a large group of pelagic fishes found in seas throughout the world except the Antarctic. A majority of them are marine fish, however, some enter fresh water to spawn.

Allis and Twaite Shad fish are the only two members of the herring family found in fresh water in the UK. Both resemble large herring (adults can be over 2 kilograms in weight) and were formerly eaten in Britain before numbers declined and the fisheries collapsed.

The Allis Shad fish has a dark back and a blackish spot on the shoulder. It has no lateral line, there are from 72 so 86 scales from gills to sail – and numerous fine gillrakers (from 60 to 120) visible on lifting the gill-covers.

The year-old fish – which has a row of dark blotches on the upper part of each side of the body – emigrates to the sea. The maximum length is 2.5 feet – maximum weight about 8 lbs.

The Twaite Shad fish is more common than the Allis Shad – with the same appearance and habits – though much smaller. Even when adult it retains a row of dark spots on the upper part of the body. There is no lateral line, the scales are smaller and firmer (58 to 66 in a row from gills to tail) – and gillrakers are short and stiff – numbering from 30 to 45; these characteristics distinguish the Twaite from the Allis Shad. Check out amazing facts of science to learn more about this species

In the middle of the 19th Century, Shad fish were as valuable as salmon and in the estuary of the River Severn, Shad fish made up about one-third of all catches. Both allis and twaite shad have declined across Europe and they are now absent from many rivers where they once flourished and supported thriving fisheries. They are still caught and eaten in parts of France and some other European countries.

The Allis Shad fish has suffered considerably from pollution, over-fishing and river obstructions and is now a rare fish over most of its range. Although previously believed to spawn in some British rivers, such as the River Severn, they have been caught only rarely in recent years. There are now no known spawning sites for this species in Britain.

Because of this decline, the Allis Shad fish is now given considerable legal protection. It is listed in annexes IIa and Va of the Habitats Directive, Appendix III of the Bern Convention, Schedule V of the UK Wildlife and Countryside Act (1981) and as a Priority Species in the UK Biodiversity Action Plan. 

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