What's the information about the great white shark?

Great white shark, the overlord in the ocean, is named "Great White Shark" because its abdomen is usually white.

From an evolutionary point of view, the body structure of the great white shark has not changed for millions of years.

But so far, people know little about this ancient animal.

Great white sharks are huge. Their cartilaginous skeleton is very light and can reach 7 meters in length.

Great white sharks can be found in any sea area with suitable temperature on earth, such as South Africa, southern Australia and the waters near California.

They have a good appetite and almost any food they can catch can be a good meal for them.

As for how many great white sharks there are in the world and how long they can live, I'm afraid no one can make it clear.

Great white sharks are stubborn by nature Once captured by humans, they will die soon after leaving their vast ocean kingdom.

At present, scientists have not successfully observed the whole mating process of great white sharks, so they have never really been in contact with great white sharks at zero distance.

Since 1988, scientists have been tracking and observing great white sharks in the waters near California for a long time.

Because the trace of the great white shark is secret, scientists specially installed observation equipment on the lighthouse by the sea. Once great white sharks are found to attack other marine animals, such as walruses and sea lions, scientists will immediately dispatch to capture the rare scenes of great white sharks' activities by using deep-water camera technology.

(The second picture on the lower left shows a great white shark catching prey and eating it. It is expected that scientists will soon complete the construction of a huge database, which is an important step towards finally solving the mystery of great white sharks.

According to the information provided by the database, biologists preliminarily estimate that great white sharks can live to 60 to 100 years old.

They generally reach sexual maturity at the age of 13, which is very similar to elephants and even humans.

According to the available data, the gestation period of female great white shark is generally 18 months, so it is inferred that the reproductive cycle of great white shark is much longer than that of other animals.

Some scientists preliminarily estimate that there are less than 1000 great white sharks left in the world.

From this point of view, although the great white shark is known as the overlord of the sea, it can not completely avoid the danger of extinction.

Scientists are also surprised to find that great white sharks not only live in the shallow sea near the coast, but also belong to the world of domineering great white sharks in the wider deep sea.

A great white shark named Dipfin is the focus of scientists' observation. In 40 days, it swam from the shallow sea near California to Hawaii, 3800 kilometers away.

Four months later, Dipfin returned to his familiar shallow waters in California.

Whether the female great white shark will continue to swim south is uncertain.

But scientists speculate that female great white sharks are more likely to give birth to young sharks alone in the south far from the coast.

Referring to the habits of whales and some bird migration, some biologists believe that great white sharks are on the road of "north-south migration" year after year.

If this hypothesis can be confirmed, more unsolved mysteries will surface: for example, why should great white sharks bother to migrate north and south? What do they rely on to position themselves in the endless ocean trek? What creatures in the vast Pacific Ocean will be delicious snacks on the journey? ……

As a biologist who has studied great white sharks for many years said, "We have just found the answer to one question, and four new questions will appear soon.

This is the fun of studying great white sharks. "(YueYang)

-China Ocean News, September 2005 13.

Dead dog at sea-white shark

In the deep sea, a photographer is shooting a great white shark.

This is a great white shark more than 5 meters long, with a triangular back, like a sharp saw knife, which can easily cut a nylon rope several centimeters thick.

The great white shark is swimming for photography. Zhang Hui's mouth showed several rows of sharp teeth, and a pair of eyes stared at by the pupil gave off a creepy cold light.

The great white shark swam quietly to the shark cage and suddenly turned away. Just as it was about to leave, it suddenly turned around, put its nose between the shark bars, twisted its body hard and tried to squeeze into the shark cage.

The photographer was still concentrating on shooting and didn't care about the behavior of the great white shark.

The great white shark churned violently, the iron bar began to bend, and anxiety and fear began to attack the photographer.

After a few seconds, the great white shark suddenly gave up his efforts, withdrew from the bent iron bar and left quickly.

Dealing with great white sharks is actually a dialogue with "death".

Among the known aggressive sharks, the great white shark is the most aggressive. Its huge torpedo-shaped body is extremely agile and can easily chase any prey.

The great white shark's kiss has small pockmarks like a short beard. It is an electromagnetic sensor, which can receive low-frequency current from animals, drowning people and other objects to find prey.

Another weapon of great white sharks is rows of sharp knife-like teeth, but they grow loosely on the gums and are easy to fall off and break when biting and swallowing prey.

But this does not prevent it from hunting, because a few days later, the shark's back teeth moved to the front row, and every 6- 12 months, all the shark's teeth were replaced.

Great white sharks have a prominent conical nose on their heads, so they are nicknamed "dead dogs at sea".

Once a great white shark catches its prey, it moves very quickly and often appears in front of it before it can react.

Great white sharks rarely fight to the death with their prey. Instead, bite your opponent until he is bleeding, then immediately let him bleed for a long time, and then seize the opportunity to take another bite.

Repeat this several times until the prey bleeds too much to move, and then slowly devour the prey.

The cunning of the great white shark is also manifested in the deception when hunting.

They always swim to their prey casually and then pretend to leave without interest. When the prey let down its guard, it quickly appeared in front of the prey, making it unprepared and waiting for death.

Great white sharks are not in a hurry to swallow artificial bait or floating objects in the sea, but turn around to observe, approach the target carefully, and rush to the target quickly when they feel foolproof.

Great white sharks are not always bloodthirsty.

A great white shark can go without hunting for weeks after overeating. Great white sharks are rarely aggressive at this time unless they are attacked.

Sometimes a drowning person or a swimmer suddenly meets a great white shark, and the great white shark slides beside them. People in a state of panic think they are dying, but the great white shark swims quietly.

People are glad that they have escaped a disaster, but they don't know that they have met a great white shark that wandered after eating, and they are no longer interested in food.

Someone once lured great white sharks with a lot of fish, meat and blood after a full meal. The great white shark just swam around the food, and there was no sign of greed.