My Deep-sea Fishery

Everyone looked at Xiang Yang blankly.

Fang Youqun even joked directly: "Brother Yang, are you watching a lot of science fiction movies? How many meters long conch? How could there be such a big conch in this world."

The other crew members were not as "upright" as Fang Youqun, but they were all whispering.

Even Chen Qingsheng twitched at the corner of his mouth, apparently he didn't believe what Xiang Yang said.

No wonder everyone didn't believe it.

Among the people present, which one doesn't see conch conch often?

Because of frequent contact, everyone is familiar with this creature, conch, so everyone feels that conch can't grow so big.

Do not.

Not everyone thinks so.

"Several meters long conch..." An elderly researcher whispered a few words, suddenly his complexion changed, and he looked at Professor Chen Yu in surprise: "Dean Chen, I know a kind of conch. It conforms to the kind of conch that Comrade Xiang Yang said."

Chen Yu's voice trembled, "It just so happens that I also know a kind of conch, which looks very similar to the one that Xiang Yang said in his mouth."

"What kind of conch do you think?" the two said in unison.

Professor Chen Yu stared at the old researcher.

One second.

Two seconds.

Three seconds.

Suddenly, the two of them took a breath together.

"His, straight-shelled Nautilus!"

"Is it really a straight-shelled Nautilus?" Professor Chen Yu looked at Xiang Yang, his voice trembling with excitement.

"Straight-shelled Nautilus?" Xiang Yang pretended to be puzzled.

The others also pricked their ears and listened attentively.

Everyone knows Nautilus.

The scientific name of Nautilus is Nautiloidea, which is a general term for marine mollusks of the class Cephalopods and Nautilidae.

There are 2 genera and 6 species of Nautilus.

As one of the four famous snails, Nautilus is so famous.

Almost everyone on the boat knows that the nautilus has a curly pearl-like shell, and the largest shell is only 26.8 cm, but the adult nautilus generally does not exceed 20 cm. How many meters is the nautilus? You know it's fake.

In fact, the real name of Nautilus that everyone knows is called Nautilus.

The big navel is Nautilus, although the name has big characters, but the body is not big at all.

Not only is it not big, but Nautilus is actually the smallest species in the entire Nautilus family, generally only 16 cm.

The outer shell of Nautilus is composed of many chambers, the outer shell is located in the outer shell, and the chambers are separated by a diaphragm.

The living big umbilical nautilus has two pairs of gills 2, with 63-94 wrists, and its appearance is somewhat similar to that of an octopus with a shell on its back, but it has no suckers and more tentacles.

Except for the straight-shelled Nautilus, which is impossible to determine, all Nautilus eyes are very simple.

Some Nautilus eyes do not even have a lens.

Most of the nautilus shells are thin and light, spirally coiled, the surface of the shell is white or milky white, and the growth pattern radiates from the umbilicus of the shell, smooth and dense, mostly reddish brown. The entire spiral shell is as smooth as a disc, resembling a parrot's beak, hence the name "Nautilus".

Because of the thin shell, when a Nautilus dies, few shells can be kept intact, so its price is generally very expensive.

Nautilus is basically a benthic animal, usually crawling slowly on the wrist at the bottom of 100 meters deep water. You can also use wrist secretions to attach to rocks or coral reefs. Most scientists believe that Nautilus cannot swim, but many diving enthusiasts have photographed Nautilus swimming on the ocean floor. Images, they can suspend themselves in the sea, flicker, and float forward like a hot air balloon.

Nautilus is a well-known nocturnal creature. They are usually more active at night than during the day. Most of the nautilus forage at night. During the day, they rest on the ocean bottom and hold their tentacles on the bottom rocks.

It is worth mentioning that there are traces of Nautilus from the surface of the ocean to the deep sea of ​​thousands of meters, and Nautilus can adapt to the pressure of different depths.

All nautilus are carnivorous animals, and their food is mainly small fish, mollusks, and benthic crustaceans, especially small crabs, which are the main food of nautilus.

Nautilus has undergone hundreds of millions of years of evolution on the earth, but its appearance and habits have changed very little. It is called the "living fossil" in the ocean and has high value in the study of biological evolution and paleontology. It also has a place in bionic science. In 1954, the world's first nuclear submarine "Nautilus" developed by the United States was developed by imitating Nautilus.

Most of the people on board this knowledge ship basically know it.

The name of Nautilus, almost everyone is like a legend.

Precisely because of the thunderbolt, when Professor Chen Yu's words touched their knowledge blind spots, they all seemed to pay special attention.

"Professor Chen, is the straight-shelled nautilus you said is also a nautilus? Why have I never heard of this kind of nautilus, let alone such a large snail, not a conch, not even a snail." Fang Youqun excitedly said. .

"Don't worry." Professor Chen Yu raised his hand and pushed the gold-framed glasses on the bridge of his nose, and then he muttered for a while before saying: "You have never heard of a marine creature like the straight-shelled nautilus. It's really normal. Because of the rarity of this creature, it even exceeds that of Tyrannosaurus Rex."

"It is more rare than Tyrannosaurus? Tyrannosaurus has long been extinct. Is this straight-shelled Nautilus also extinct?" someone asked.

"Extinct. Extinct for a long time. Before the emergence of Tyrannosaurus, the straight-shelled Nautilus was extinct, but it was once the overlord on this planet, and it was also one of the earliest overlords on this planet. The second overlord on the planet." Professor Chen Yu sighed.

Everyone looked at Professor Chen Yu~www.readwn.com~ as if listening to the fantasy.

"Teacher, what do you mean, this is a fossil left by an ancient creature?" a middle-aged, bald scientific researcher asked.

Professor Chen Yu nodded, "It can be said that the straight-shelled nautilus was the top predator in the Paleozoic Ordovician ocean. Later, due to the emergence of more powerful creatures or other reasons, it was extinct. Its close relative, the small roll-shelled Nautilus, survived due to its small size, roll-shaped shell, and tenacious life."

"I do not approve of the extinction of the straight-shelled nautilus due to the emergence of stronger creatures in the ocean. When the straight-shelled nautilus enters the prosperous period, they have a huge body, up to 6-10 meters in length, with a shuttle-like shell and spraying water. Go forward, swim quickly, and quickly chase after the prey is found, and then use the tentacles to capture it. At that time, most animals will die if they are stared at by the straight-shelled nautilus." An old biologist said.

"What I'm talking about is just a guess." Professor Chen Yu laughed: "Because I don't believe it, I have to study it. Understanding the process of life provides support for mankind to cope with catastrophic disasters. This is not what people like us do. Responsibility and mission?"

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