Sharks are a cartilaginous fish, one of the oldest fish species on Earth, older than dinosaurs, and have lived on Earth for more than 400 million years.
There are more than 400 species of sharks in the world, of which the great white shark is the largest predatory shark.
They can grow to a length of about 4 meters 5, but it is said that the largest great white shark can grow to more than 6 meters and weigh more than three tons.
The Great White Shark is generally considered to be a cold-blooded and ruthless killer! The famous American director Spielberg's "Jaws" has deepened people's fear of great white sharks.
● Great white shark distribution all over the world.
The great white shark's greed is famous, and scientists have found all sorts of things inside the great white shark's stomach, and it is said that there are unexploded bombs and iron anchors.
However, scientists also acknowledge that great white sharks are intelligent animals because they can hunt dolphins and seals. Dolphins and seals are mammals in the ocean and are both more intelligent.
<h1>Great white sharks are mainly distributed in temperate and subtropical waters. </h1>
From the coast of China to Hawaii to California, they are found throughout the Pacific Ocean, with the exception of the Southern Ocean.
Australia and South Africa are generally considered to be active hunting grounds for great white sharks, but recent studies have found that great white shark activities in South Africa have been greatly reduced or even disappeared without a trace.
Chris Fallows, shark expert and cage diving operator.
Originally, as many as 40 great white sharks could be seen in the cool coastal waters of Gansbay on the Atlantic coast of the Western Cape. Now, apart from some sporadic sightings, the Great White Shark is gone.
Chris Fallos believes there could be two reasons.
One of them is the recent appearance of killer whales in Gansbay and Forth Bay, which specialize in hunting large sharks and scaring away great white sharks.
The other is due to human fishing for small sharks, which has led to a decrease in food for great white sharks. The local shark longline fishery has set up kilometres of bait on the seabed, capturing a large number of small sharks, which are exported to Australia.
<h1>The Great White Shark has super perceptual abilities. </h1>
Great white sharks can swim 50 kilometers per hour and have highly developed perception capabilities. They have a total of 6 senses, including smell, hearing, touch, taste, vision, and electromagnetic detection.
The great white shark's most acute sensory organ is the sense of smell. If only one drop of blood floats in 10 billion drops of water, they can smell it! Their nostrils are under the nose and lead to an organ called the olfactory ball, the largest of all sharks.
The shark's outer ear is just two small openings behind and above the eyes, which are usually difficult to see but powerful. Inside the ear, there are cells that can feel even the tiniest vibrations in the surrounding water bodies. The shark also has a gravity-responsive "ear canal lead hammer," a small piece of movable cartilage that allows the shark to perceive its position in the water: head up, head down, right side up or upside down.
Great white sharks have a good field of vision, and the retina of the eye is divided into two areas, one area suitable for daytime and the other suitable for low light and nighttime. To protect their eyes, great white sharks can roll their eyes backwards into their eye sockets when threatened.
Another perceptual ability of sharks is awe-inspiring! Around their faces and eyes there is a special organ called the Lorenzny belly pot, which can sense the direction of the current and can use electromagnetic fields to navigate the ocean.
Sharks have taste buds in their mouths and throats that can recognize food before swallowing.
There is a great white shark in Australia entangled in fishing nets, dying, and it turns out that a kind fisherman Arnold. Piet came over and saved it.
<h1>The Great White Shark and this man formed a deep friendship. </h1>
When Piet slapped the water, great white sharks would swim over. The great white shark would jump out of the water and let his savior stroke his head.
Pietrt named the great white shark Cindy.
Although it looks scary, the great white shark has never hurt the benefactor.
And the great white shark will sometimes lie down and let people touch the belly, which is a manifestation of extreme trust in people.
Because the great white shark is in this position, it will be in a state of neurological suspended animation, at the mercy of others.
Killer whales have fangs with no molars and cutting teeth and no way to chew. So killer whales are very fond of eating soft things like animal livers and tongues.
The liver of the great white shark is therefore very attractive to killer whales. When killer whales hunt great white sharks, they will suddenly rush to the bottom of the great white shark, and then turn the body of the great white shark over, so that the great white shark will be motionless in a state of suspended animation and let the killer whale slaughter.
This great white shark interacting with humans is the first time in recorded history that a great white shark has established friendship with humans.
<h1>Nevertheless, the great white shark is still dangerous. </h1>
40% of shark attacks that occur off the coast of Australia are linked to great white sharks.
From January to June 2020 alone, Australia's great white sharks killed three people.
In January 2020, Gary Johnson, president of the Esperance Dive Club in Australia, was attacked by a great white shark while diving near Koh Kur Island on the southern coast of Western Australia, and the body has not been found.
● Stills from the movie Jaws.
In April, a great white shark caused fatal injuries to a 23-year-old wildlife worker on the Great Barrier Reef.
In June, a 60-year-old surfer was killed by a great white shark attack near Neptune Island in South Australia.