The sound of dense gunshots sounded from not far away, and hot bullets erupted from the muzzle of the Type 95 rifle in the hands of Feng Liangshan and others, sweeping straight towards the big fish that was still rolling.

Zhao Xinghua's line of sight was inadvertently brought into a dynamic visual state by these bullets, and he could clearly see that the warheads that were fired at the big fish were all reflected and jumped around when they hit the dense scales, and none of the bullets drilled into the body of the big fish, this was the first time Zhao Xinghua had seen a creature that could not be harmed by thermal weapons.

"Run!"

Zhao Xinghua shouted loudly at Feng Liangshan and Fan Yao, I don't know where they picked up the rifles, they actually stood together stupidly, trying to use the Type 95 rifle to cause damage to the tumbling big fish, it was really fatal.

It's a pity that the four people over there are still silent in the pleasure of pulling the trigger and pouring ammunition, plus there is some distance between him and a few people, and the roar of the muzzle eruption, none of them heard Zhao Xinghua's shouting here.

After the black-brown strange fish continued to roll around a few times and hit a tree, it finally stabilized its body, turned its head to look in the direction where the gunfire came from, and then bowed its body and bounced off the ground violently, this jump was more than ten meters high, like a hill towards the four people there.

Fortunately, Fan Yao, Feng Liangshan and the other four also have the physique of evolutionary beings, and they also have the experience of facing the enemy in the past, and at the same time they scattered and fled in four directions.

"Bang~!"

Zhao Xinghua felt that as the big fish landed, the ground under his feet trembled, and the big fish fell to the place where the four of them had just shot and stood.

Just as the big fish was hesitating to chase the human in which direction, several violent muffled noises occurred one after another in the area covered under it. Zhao Xinghua saw a large piece of bright red flesh detached from the body of the strange fish's abdomen and splashed around, it turned out that Fan Yao and the others had already pulled out the pull ring of the Type 67 wooden-handled grenade tied together in advance when they left.

"Roar~!"

The monster fish, wounded by the grenade, raised its head and let out a roar of pain.

Zhao Xinghua only saw its whole picture for the first time at this time, this thing is nearly 30 meters long, the body shape has been fusiform, the body surface is black and brown, the head tip is long, there are 4 snout whiskers in front of the mouth, the mouth is located on the ventral surface, the body surface is covered with large and hard bone scales, the back row, the body side and the ventral side of the two rows, the tip of the tail and the fins are like needles, people will immediately shudder when they see it, this thing is obviously different from other fish.

After the big fish was injured, it stopped pursuing these fleeing humans, turned around, and slowly writhed towards the river, looking completely lost the momentum just now, I don't know if it was the pain or other reasons, but became cautious.

"Head, can we still catch up and fight? We picked up a lot of guns. ”

A newly recruited man from the Zhaohui Society ran over and asked Zhao Xinghua.

"Don't waste it, the gun won't have much effect on it, and we don't know if it has any companions, and if one or two more are provoked, we'll be done here."

Seeing that the big fish didn't look like it would pose a threat to several people again, the six of them gathered together again.

"Teacher Feng, do you see what kind of fish this is?"

Zhao Xinghua asked, this Feng Liangshan is the teacher who taught him the "Wudang Songxi Stick Method", he usually doesn't talk much, but he has good kung fu in his hands, and he is also a disciple of the Wudang sect.

"Sturgeon!"

"Sturgeon?"

"Yes, we also call them "Tanlong" there, and some people call them "sturgeon sharks" when they are in the sea, which is what we call a type of sturgeon. ”

Feng Liangshan replied affirmatively.

"You mean, something this big is a sturgeon? Doesn't it mean that wild sturgeons have been extinct in the first two years? ”

"I don't know, maybe it came back from the sea not long ago."

"Is it coming back to spawn? Running into the Han River? ”

Another man asked incredulously.

"Yes, look over there."

Ning Yue pointed to the traces of the big fish gliding on the ground.

A line of bright red blood stretched behind the big fish, and from time to time a few plump spheres the size of watermelons appeared, refracting golden light in the sunlight.

"The sturgeon is the largest, long-lived, oldest fish species in the world. The existing ancient biological population of the sturgeon family originated in the Cretaceous period hundreds of millions of years ago, and is known as the "panda" in the water. The sturgeon is a rare ancient fish left over from the Mesozoic Era 150 million years ago, it is between cartilage and hard bones, the degree of ossification of the bones is generally reduced, the central axis is the elastic notochord of unossification, no vertebral body, and most of the cartilage shells with the skull are not ossified. Sharks are cartilaginous fishes, cartilaginous fish have an earlier evolutionary position than bony fishes, and sturgeon are in between, retaining many morphological characteristics of cartilaginous fishes, such as body size, flat pectoral fins, suboral position, crooked tail, etc., so they look more like sharks. ”

"Is there any difference between cartilaginous fish and bony fish?"

"The age of evolution is different, the earliest ancient fish appeared on the earth, and gradually evolved into primitive amphibians, ancient amphibians evolved into reptiles, and some reptiles evolved into primitive birds and mammals. So the general course of vertebrate evolution is: primitive fishes to primitive amphibians, then primitive reptiles, and finally to primitive birds and mammals. Therefore, primitive reptiles evolved into modern primitive birds and mammals, all of which evolved from fish, and aquatic fish also evolved from cartilaginous to bony fish, and sturgeon is between cartilaginous fish and bony fish, which has not changed much in the course of hundreds of millions of years. ”

"It hasn't evolved for hundreds of millions of years, and now it's suddenly like this!"

"Maybe the more primitive the creature, after getting the opportunity for genetic mutation, the faster the speed of evolution will be, and the more direction of genetic mutation will be selected, unlike our human body mechanism has almost evolved to the extreme."

Zhao Xinghua replied.

"It came back from the sea to lay its eggs here, it's its birthplace and it's home. Under normal circumstances, the sturgeon is a mild-tempered fish, as an ornamental fish, there has never been an active attack on other creatures, like today, to see humans chasing after each other, indicating that it has a deep hatred against us humans, and it chases us not just to eat. ”

"I just saw some tattered fishing nets at the barracks, and I think the previous humans may have accidentally caught the eggs of the sturgeon, which attracted the revenge of the big fish."

Fan Yao stood aside and told what he saw.

The cartilage of the sturgeon is also known as "dragon tendon", which has anti-cancer factors and health care effects, and can be eaten completely directly, known as "shark fin, sturgeon bone". It's just that they didn't expect that the sturgeon's bone scales would be so hard that even a bullet could penetrate it. ”

"After I go back, tell the senior management of the Shenhu base that I don't want to come here for a few months, and when the big fish return to the sea, don't go fishing by boat in this section of the Han River Basin, and there won't be only one big fish migrating here."

After Zhao Xinghua watched the injured big fish re-enter the water, he made a final summary to his comrades-in-arms.

…………………………………………………………………………

Six or seven thousand years ago, the civilization of the Yellow River Basin and the civilization of the Yangtze River Basin converged and converged in this basin, and the Chinese civilization was formed. This water and the Chinese nation are both named Han. Therefore, when it comes to rivers, China has a saying of "Jianghuai River Han" since ancient times. It is said that the name of the Han River originated in the Xia Dynasty, and Li Daoyuan's "Notes on the Book of Water" is to juxtapose the Han River with the Yangtze River, the Yellow River and the Huai River with the "River Huai Han". As late as the Spring and Autumn Period, the Han River maintained its position as the largest water (shipping) in ancient China.

"The breadth of the Han is unthinkable; Jiang Zhiyong is incomprehensible. This famous sentence in "The Book of Poetry: Han Guang" has become a mark of the confluence of the river and the Han Dynasty and the turbulent water in history. However, with the construction of dams on the Han River, the artesian river has become "intestinal obstruction", and the original ecology no longer exists, and if this situation is not changed, the Han River may soon become a "dry river".

Today, the more than 1,000-kilometer stretch of the river from the upstream Golden Gorge to the downstream Xinglong will be artificially divided into 15 sections, and there will be a dam less than 100 kilometers. In the most densely populated territory of Xiangfan, a dam will be built less than 50 kilometers. This would be tantamount to dismemberment of the Han River itself, given that each dam has dozens of kilometers of backwater areas in which the Han River will become lakes; The water flow rate in the non-backwater area will also be greatly affected, and the environmental capacity of the river will be greatly reduced. This situation of broken rivers is even more serious on the tributaries of the Han River. More than 900 small hydropower stations have also turned the tributaries of the Han River into ditches and lakes, reducing their environmental capacity, which has caused many ecological problems.

From March to June every year, when sturgeon migrates and spawns, barrage dams block the migration of fish, which is not a problem unique to the Han River. Because of the construction and utilization of water conservancy, it is said that there is hardly a large river that flows naturally in the country, and migratory fish are facing a crisis of survival and reproduction, and some migratory fish in the river have become extinct.

In the early 70s of last century, there were more than 10,000 species of fish living in the Yangtze River, and after the completion of Gezhouba in the 80s, the number of fish in the Yangtze River dropped sharply to more than 2,500 in ten years.