My Deep-sea Fishery

"Master Chen, keep an eye on him. If this kid gets lucky and catches a shark, remember to give him a hand, so that he won't be dragged into the sea by the shark." Xiang Yang told Chen. Qingsheng joked with Fang Youqun.

Chen Qingsheng grinned, "Don't worry, captain, if it can catch sharks with its fishing skills, I'll catch a whale and show you."

Xiang Yang grinned when he heard this, of course he knew that Chen Qingsheng was also joking.

Fang Youqun, on the other hand, curled his lips, looked very dissatisfied, threw the fishing line into the sea, and muttered, "I'll catch a shark in a while, don't envy me."

Xiang Yang smiled and shook his head, too lazy to talk to this kid.

As a result, at this moment, Fang Youqun's float suddenly sank quickly to the bottom of the water, and at the same time, the bundle of the fishing line also started to rotate quickly.

Xiang Yang was startled, thinking that this kid really caught a shark.

Xiang Yang quickly ran to the side of the ship and glanced at the bottom of the sea.

At first glance, Xiang Yang didn't recognize the creature Fang Youqun had caught.

I saw that the thing looked like an oversized earthworm, gray-red, without eyes, with a wide mouth, and a body as long as a snake.

Immediately afterwards, Xiang Yang remembered that in the south of the South Pacific Ocean, some seawater was extremely deep, completely bottomless, without any sunlight and temperature, and there lived a kind of ancient fish called hagfish.

Hagfish and gill eel are close relatives, commonly known as drill-belly fish, with a body like a river eel, with a smooth and soft shape. The first half of the fish's body is cylindrical, and the second half is flattened. It looks like an extremely fat earthworm.

Xiang Yang observed the hagfish carefully, and found that it really looked like an earthworm.

Inside its wide mouth, there are no upper and lower jaws, and the mouth is a huge suction cup. Inside the suction cup, there are sharp horny teeth, like rows of combs, which can scrape the meat from the prey.

Fang Youqun saw that the float had reacted just after putting down his bait, and the reaction was so intense, he immediately shouted happily, "Brother Yang, look, look quickly, I caught it, I caught a big fish. "

"It's probably a hammerhead shark." Fang Youqun said expectantly.

"It's a big fish, give me the fishing rod." Chen Qingsheng said directly.

Fang Youqun immediately handed the fishing rod to Chen Qingsheng honestly. In terms of fishing skills, Fang Youqun was still far inferior to Chen Qingsheng. Although he didn't know what kind of fish this kind of big fish was, Fang Youqun already knew in his heart that this fish, his own If you can't catch it, you have to ask Chen Qingsheng to do it.

I saw Chen Qingsheng deftly loosening the fishing line, and soon, Chen Qingsheng pulled the hagfish onto the deck.

"Fuck, what kind of fish is this? It looks so ugly." Fang Youqun, who was full of anticipation, scolded immediately after seeing the hagfish.

"Be careful, this guy is called a hagfish, it's very dangerous." Chen Qingsheng shouted.

Hagfish are very famous in the biological world.

About 600 million years ago, the mountains on the earth moved violently, and many caves were formed after collisions and fractures.

Since then, hagfish have been living in the dark and deep waters.

After 600 million years of evolution, hagfish have fully adapted to an environment without sunlight, green, and competition.

Hagfish have no eyes, and their transparent bodies, including the spine and internal organs, are clearly visible. Usually, they rely on microorganisms in filtered water to live. When encountering prey, they can also use their sucker-like mouths to scrape off a layer of prey. meat down.

Evolution is fair in one sense, and what is lost is compensated in other ways.

Hagfish are a good example of this.

After being tempered in a harsh environment, hagfish have become not afraid of heat or cold, and can survive in water temperatures ranging from minus 40 degrees to minus 20 degrees, which is a function that all other fish do not possess.

What's even more amazing is that the hagfish has evolved four hearts in order to survive the long period of lack of food. It can live well without eating any food for half a year.

In the past, humans have always believed that hagfish perceive environmental changes mainly through their mouth tentacles and facial nerves.

But after careful study, scientists found that it is not only the tentacles and facial nerves that guide the hagfish to accurately approach the target, but also the supersensory cells that are all over the body and are difficult to see with the naked eye.

In addition, besides the line measuring system of hagfish is more sensitive than that of ordinary fish, the function of their tiny raised sensory cells has also been brought into full play, which can completely replace the visual organs.

The hagfish's tentacles can not only detect tiny fluctuations, but also have taste buds on the tentacles that are enough to distinguish different fish. It is precisely these tentacles that hagfish rely on to approach their prey.

In the past, some scientists used underwater camera technology to study the predation process of deep-sea hagfish.

Scientists have discovered that hagfish are actually the "natural enemies" of sharks.

Fang Youqun said nonchalantly, "Brother Yang, isn't it just a big earthworm? Why should you be careful?"

"Big earthworm?"

"Hmph, do you think sharks are scary?" Xiang Yang asked.

Fang Youqun nodded, "Sharks are the overlords of the sea. They are the most ferocious fish except killer whales. Of course they are scary."

"Sharks are invincible in the bottom of the sea. No matter where they swim, other fish are frightened and run away, but hagfish are the nemesis of sharks. Do you think hagfish are scary?" Xiang Yang said.

"What? This thing is the killer of sharks? It's impossible." Fang Youqun exclaimed.

"Believe it or not, the fact is like this."

Although hagfish are not as big as sharks, their teeth are not as sharp as sharks, and their strength is far less than that of sharks, hagfish can use their survival skills to get into the belly of sharks.

Hagfish have a very large appetite. If there is enough food, hagfish can eat fish equivalent to twice their own body weight per hour.

Hagfish are like silk, they eat and excrete at the same time. Many sharks are killed by hagfish in this way.

After hearing what Xiang Yang said, Fang Youqun said in surprise, "Brother Yang, according to what you say, isn't this hagfish a parasite?"

"It's not just as simple as a parasite?"

Xiang Yang shook his head and continued: "In addition to feeding on small crustaceans and various fish, hagfish also attack all big fish. They are veritable deep-sea ghosts, and biologists call them fish thieves. "

Humans once found more than 120 hagfish in the body of a seabass.

Sometimes, some seafood is made into sashimi, and there are hagfish cubs in the sashimi. After those hagfish cubs are eaten by humans, they will also parasitize in the human body.

There was once a rich man who liked to eat seafood sashimi very much. As a result, one day he had a very painful stomach. He thought it was appendicitis. After being sent to the hospital for examination, the doctor found a half-meter-long hagfish in his body, which was extremely terrifying.