Thirty meters under the sea, a fierce fight was going on.
Bi Fang grabbed the rock wall and stabilized his body. The two figures had almost disappeared from his range of perception. Even if they appeared occasionally, they would only flash by.
In ancient Greece, harming a dolphin was punishable by death.
The reason for this is that history has never been short of stories of dolphins rescuing people.
Mandy is one of those who has experienced it personally. Three years ago, he and many friends were surfing on the east coast of Australia. When the second big wave was about to hit, a tiger shark hid in it.
It is one of the most ferocious sharks in the ocean. It is a ferocious and cruel carnivore in the shark family second only to the man-eating shark. It is the largest member of its family and genus currently known.
The maximum body length can reach nearly eight meters!
Eight meters, almost the length of a small box truck.
They hunt all kinds of marine fish, mammals, seabirds, turtles and even people, and are known as "tiger in the sea".
They are ferocious and gluttonous, with broad snouts like shovels and teeth like steak knives.
Because of the tiger-like pattern on his body, he got the name tiger shark.
The one Mandy encountered was definitely not eight meters long, but it was definitely over five meters long, much longer than a normal car.
At that time, the pattern of the tiger shark was mixed with the wavy pattern reflecting the sunlight, shining with a unique light.
It rushed towards Mandy and quickly entered the attack range.
Bi Fang wanted to know what Mandy was thinking at that time. Maybe her legs were so weak that she was about to fall off the surfboard.
The distance between the two sides was less than two meters. Mandy's fingers traced the waves, and under the refraction of the sun, it was like touching the skin of a shark.
He lowered his head and thought about it, as if he were looking at a shark specimen in a glass showcase. Soon, he would also become one of the specimens.
At this moment, a dolphin jumped out and hit the tiger shark from the side, driving it away.
At that moment, Mandy felt the strongest connection with animals in her life, so much so that even today, three years later, she still happily tells this story to everyone.
That time and that moment, exactly this moment.
The battle between Niu Hong Kong trevally and dolphins has long been determined in Bi Fang's mind.
The Dolphins will definitely win.
Just comparing data, Niu Hong Kong Trevally is far from its opponent.
The speed of Niu Hong Kong trevally can reach 60 kilometers per hour, but the speed of dolphin can reach an even more terrifying 70 kilometers, close to 20 meters per second. The limit can reach 80 kilometers, 22 meters per second, which is as fast as Niu Hong Kong trevally.
There is no trace of it at all.
In fact, some scientists once believed that based on the characteristics and shape of the dolphin, its swimming speed could not exceed 20 kilometers/hour.
If the dolphin's swimming speed exceeds the limit of its muscles, it can only be achieved in the following two situations.
First, dolphin muscles are supernaturally efficient, six times stronger than those of ordinary mammals.
The second is that it uses some unique method to reduce resistance.
This hypothesis was proposed in 1936 by James Gray, an aquatic animal research expert in the Central Government. This theory is called "Gray's Strange Theory."
It was quickly proven that dolphin muscles have no special structure, and of course they are not supernaturally efficient.
Therefore, according to current speculation, it must be the second reason that causes dolphins to swim at high speed.
Is it a form? Some people speculate.
it's not true.
Scientists made a model of a dolphin, which is the same as a real dolphin from its body shape to its surface. The model is also equipped with a propeller that has the same thrust as the dolphin's tail fin.
The results of the experiment were disappointing. It was much slower than the speed of dolphins.
After further research by many physical biologists, it was discovered that the skin of dolphins is divided into upper and lower layers. The upper layer is the outer layer, which is very elastic; the lower layer, which is the inner layer, is also very elastic.
When the upper layer of skin is subjected to water pressure, it will become uneven depending on the degree of water pressure.
When a dolphin enters high-speed operation, the turbulence caused by body vibration will be adjusted in the uneven changes of the skin, thus greatly reducing resistance.
Extremely miraculous.
In addition, dolphins may look cute, but they are firmly at the top of the ocean food chain, and their fighting power is stronger than most people think.
Sharks are the most ferocious fish in the ocean, known as the "wolves of the sea". They live on injured marine mammals, fish and carrion, eliminating weaker members of the animals. They have few opponents in the ocean, but ferocious sharks
Attacks on dolphins are rare.
Fish are afraid of sharks, and sharks are afraid of dolphins.
Small dolphins are fast and flexible, and can easily avoid shark attacks. It is difficult for a shark to bite a dolphin, but it is very easy for a dolphin to attack a shark.
Although large dolphins are not that flexible, they can knock sharks off their feet with their strong bodies.
You should know that once a shark is knocked over, it will fall into "tonic stillness" and fall asleep.
And in biological taxonomy, sharks belong to the subclass Elasmobranchia of the class Chondrichthyes.
Their bones are made of cartilage and connective tissue. Although they are elastic, strong and durable, their density and hardness are far lower than real hard bones.
In addition, sharks have no ribs, so the lower sides and abdomen are the weakest areas of their body.
Dolphins are aquatic mammals, with hard upper and lower jaws and a protruding snout like a sharp spear.
When the two truly engage in a life-and-death struggle, the dolphin will not let go of the shark's weakness.
Just like piercing wet window paper with your fingers - as long as the speed and force are right, the dolphin's spear-like snout can even directly pierce the body of the shark, causing fatal damage to the shark.
Moreover, there is another person in the dolphin family who is called the "king" in the shark world - the killer whale.
Killer whales are to the world of sharks what Chinese table tennis is to the international table tennis world. They are a pyramid-like existence that transcends hell and even purgatory levels of difficulty.
Basking sharks, tiger sharks, rat sharks, six-gill sharks, all of them will be scared to death when they encounter killer whales.
Although the cow's trevally does not have cartilage and connective tissue all over its body, its abdomen is still soft and has a sharp spear. The super-fast swimming dolphins are not afraid at all.
In Bi Fang's perception circle, when the Niugang Trevally appeared again, its speed had dropped significantly and it was floating quietly in the water.
Bi Fang tightened his grip on the harpoon and approached slowly. The closer he got, the clearer his perception became. He could detect the pitted holes on the Niugang Trevally's body, as if it had been repeatedly pierced by a spear.
As if sensing Bifang's approach, the trevally tried to escape, but with a single blow, the spear suddenly penetrated the eyeball of the trevally and hit its brain. The already seriously injured trevally was killed on the spot.
After dealing with the Niugang Trevally, the dolphins seemed very happy and kept swimming within Bifang's perception circle.
It's a bottlenose dolphin.
Previously, the Cow Harbor Trevally was competing with the dolphin, and the speed was so fast that Bi Fang had no time to sense it carefully. Now he finally saw what kind of dolphin it was.
It is the most common bottlenose dolphin in aquariums, also called sharp-beaked dolphins and bottlenose dolphins. They are mainly distributed in major temperate and tropical oceans, including China's Yellow Sea, Bohai Sea and other seas.
It has a long snout, short mouth, and a cleft mouth that always seems to be smiling. It is a Class II protected animal in China.
The life span of female bottlenose dolphins is about 80 years, while male bottlenose dolphins do not easily live past 50 years due to greater life pressure.
This kind of dolphin has very high intelligence, self-awareness, strong emotions, and even strategy.
Some people believe that the intelligence of dolphins should be ranked in front of chimpanzees and second only to humans.
The bottlenose dolphin in front of me is quite large, more than two meters and three meters, and its weight is definitely more than 300 kilograms. With such a large size, it should be a male.
Two meters three and three hundred kilograms. In comparison, the Niugang trevally, which is only one meter six and weighs about seventy kilograms, is nothing at all. It is just a small fish and shrimp.
No wonder it was solved so easily.
Watching the dolphins swimming beside him, Bi Fang couldn't help but reach out and touch them.
As a professional diver, it should be a basic rule not to touch the creatures in your hands at will. Perhaps a little bit of human skin will cause damage to the underwater ecological environment.
Bi Fang's fingers touched the swimming dolphin. The bottlenose dolphin looked very calm. Bi Fang pressed hard and could feel it through the diving suit. The dolphin's skin was as smooth as silk and its texture was like a sponge. It was extremely beautiful and textured.
Excellent.
After waiting quietly for a while, another streamlined creature broke into Bifang's perception circle.
There was another bottlenose dolphin, also swimming next to Bifang.
Male bottlenose dolphins usually live alone or in small pods of 2-3, and they will only join large pods of other female bottlenose dolphins for short periods of time.
It is worth mentioning that the attachment between members of the bottlenose dolphin group is very strong. If one individual is injured, the other members will not escape, but will surround the injured companion and cannot bear to abandon it. They are extremely compassionate species, and every time they
This is true for every one.
From this point of view, dolphins are much smarter than humans.
On this planet, dolphins are second only to humans in intelligence.
Its brain weighs almost the same as a human, about 1.5 kilograms.
Humans have the highest brain ratio of all animals on earth, about 2%, while dolphins rank second, at about 1.5%.
In addition, the number of neurons in the dolphin brain is 18 billion, which is more than the 13 billion in humans.
Therefore, dolphins are far stronger than other animals in terms of comprehensive brain data indicators, and they are second only to humans.
Dolphins can use ultrasound to sense the bone structure of the human body to determine whether the other person is a human.
They often rescue humans who have fallen into the water and lift drowning people to the surface to breathe. Just like rescuing their own companions, they will also fight sharks to save humans.
In order to study dolphins, humans have conducted various experiments, including one secret experiment that was not exposed until more than 50 years later.
In 1963, funded by NASA, an experiment was conducted on a male bottlenose dolphin named Peter in the U.S. Virgin Islands. The purpose of the experiment was to study whether dolphins could learn human language and successfully communicate with humans.
The experimental team arranged a room filled with water and allowed a female researcher named Margaret to live with Peter. They were not separated 24 hours a day, eating, sleeping, studying, and entertaining together.
In this way, Margaret can teach Peter to speak English like a mother teaches her child, and let him understand and understand human language.
Although dolphins do not have vocal cords, they can use the blowholes on their heads to make sounds.
Peter the dolphin showed amazing learning ability. In less than two weeks, he learned to say numbers like "one, two, three" and simple greetings like "hi, hello", and eventually learned more than 700 English words.
word.
What is incredible is that Peter is not simply "parroting", because when Margaret says "work, work, work" to it, meaning to ask it to study, it can really understand and answer "play"
,play,play”, telling Margaret that it doesn’t want to study, it wants to play.
Even when Peter wants to eat fish, he will say "fish in bucket" to Margaret, which means that he wants to eat the fish in the bucket.
However, as the experiment progressed, something unexpected happened.
Peter is becoming less and less willing to study and just wants to be close to Margaret. He uses various methods to attract Margaret's attention every day.
Peter would become irritable when Margaret left him to go to the toilet.
When Margaret was talking to someone on the phone, Peter would yell into the phone.
Obviously, it is jealous.
Peter had fallen in love with Margaret, which made the research team think that the experiment was developing in a direction beyond their control, so the experiment was terminated. They forcibly separated Peter and Margaret, although Margaret was unwilling to leave.
peter, but there was nothing she could do about it.
When Peter discovered that Margaret never appeared again, he became extremely angry. He kept swimming around in the pool, calling Margaret's name, and refused to eat or drink.
One day a few weeks later, Peter hid under the pool and refused to come to the surface to breathe. He suffocated himself to death.
The breathing method of dolphins is completely different from that of other animals. It is absolutely impossible for humans to commit suicide by holding their breath, because after suffocation and coma, the body will instinctively let go of breathing.
But dolphin breathing requires control by the brain rather than autonomic nerves, so each breath requires active muscle control.
This was a scientific view in the past. People used this to explain the reason why dolphins hold their breath and commit suicide, and it has been widely circulated.
But Richard told Bi Fang that this was inaccurate.
Someone once used complex and complete anesthesia experiments to prove that dolphin breathing can be either "automatic" or actively controlled.
They can suffocate and commit suicide by closing their spiracles.
So everything is proven.
This dolphin died for its love.
What is suicide?
This is a complex issue. Modern science is so inconclusive, but it still does not fully understand why humans commit suicide, and the risk factors for human suicide are still not determined.
The National Psychiatric Association lists suicidal behavior as a "disorder requiring further consideration."
Even what constitutes human suicide is controversial—as much a matter of biology and psychology as it is of philosophy and semantics.
Others have pointed out that even among humans, pre-pubescent children or children with developmental disabilities, suicidal behavior is rare.
No human child can understand the concept of suicide, and the most intelligent non-human animals are unlikely to have an intelligence level that exceeds that of human teenagers. It seems even more impossible to expect them to understand their own death and have the ability to perform suicidal behavior.
In Bi Fang's view, the so-called suicide requires that the perpetrator must have self-awareness, understand the true meaning of death, and have the ability to perform a series of actions that he knows will lead to his own death.
Everything proves that dolphins have extremely high self-awareness.
Because this experiment involved ethical and moral issues, the data and files were sealed at the time and have not been made public.
It was not until 2014 that this experiment was finally declassified.
Bi Fang slowly spit out a bubble. He looked at the dolphins beside him and slowly clenched his fists, mobilizing all the muscles in his body.