My Deep-sea Fishery

But this Nautilus doesn't.

Its shell is a round plate, which is exactly the same as the ammonite fossil, but it is much smaller than the ordinary ammonite fossil, and it is a bit like a miniature ammonite fossil.

Xiang Yang was a little suspicious, "Is this a phenomenon of returning to ancestors?"

Xiang Yang doesn't believe in anything, this is a real ammonite, because it is impossible.

Ammonites were extinct quite early, and there was no longer a living body, and modern humans simply couldn't see it with their own eyes.

Xiang Yang thought about it carefully. It is said that there is a species of Nautilus and Ammonites that look very similar to the creature.

This kind of nautilus itself evolved from ammonites. Although these two organisms have developed for tens of millions of years after evolution, the appearance of these two organisms is very similar, and even the fossils of these two organisms are placed. Together, many people can't tell.

It's just that the number of this kind of Nautilus is extremely rare, many people have only heard of it, but never seen it.

Xiang Yang guessed that this Nautilus should be the legendary Nautilus.

At this time, the little Nautilus head came out of the shell and carefully surveyed the surroundings. It saw the giant Xiang Yang standing in front of it, and immediately retracted its head, and then lay straight on the ground. Play dead.

Xiang Yang smiled heartily. After endless years of evolution, most of the marine creatures in his mind have become stronger and stronger.

But this Nautilus is getting weaker and weaker as it evolves.

Even today, there is no means of attack at all, and when you encounter danger, you can only lie on the ground and play dead.

In ancient times, the Nautilus family was also famous.

Let alone the straight-shelled Nautilus that once dominated the ocean.

As far as the ammonite fossil is concerned, as far as Xiang Yang knows, an unidentified ammonite fossil with a diameter of more than 2.3 meters has been found in Colombia.

Once confirmed, that ammonite fossil is the largest known ammonite fossil.

These ammonite fossils are not only for viewing purposes in the eyes of scholars. Because the existence of ammonites spans a long period of time, and the number of distribution in the sea is also very extensive, the megaliths are the most useful for geologists to estimate the rock age. Fossils, so scholars can easily infer the age of the rock by analyzing the ammonite.

Of course, Nautilus is always the most valuable conch, more valuable than ammonites.

Since the fossil of Nautilus is very rare, the price is very high, and many fossil players even use ammonite fossils to fake Nautilus fossils to sell.

Of course, this kind of deception cannot deceive those professional people.

Although Xiang Yang is not a professional, he also knows several ways to distinguish between ammonites and nautilus shells.

Among them, the simplest identification method that Xiang Yang knows is that the most obvious difference between ammonite and Nautilus is the difference in shell seams and textures.

Even if it is complicated and has multiple folds, Nautilus is a simple curve. If it is a half-dissected fossil, just remember that the next wall of the ammonite is curved outward, and Nautilus is inward. Just remember With these two identification methods, basically you will not be deceived.

Xiang Yang flicked the little Nautilus pretending to be dead in front of him with his fingers. Speaking of which, Nautilus has a relationship with humans. There are many air chambers in this organism. When the Nautilus sinks in the sea, it will Fill the air chamber with water to increase weight.

However, the rise is the opposite, which is to inflate the air chamber to reduce weight.

Mankind used this biological diving principle to invent the first nuclear-powered submarine, the Nautilus.

The difference between modern and prehistoric Nautilus is really very big.

The current body length of Nautilus is generally no more than 20 cm, but in prehistoric times, Nautilus, like ammonites, had a variety of outer shells in prehistoric times.

Among them, the straight-shelled Nautilus once discovered by Xiang Yang can grow to a length of 12.5 meters.

That kind of body was a very huge creature even at the time, and the huge shell of the straight-shelled Nautilus was not unattractive.

In fact, they are very sturdy, dozens of times harder than the current shells of conch shells.

If this Nautilus, its ancestor, the straight-shelled Nautilus, was bombed like this by one person, it might turn around and attack Xiang Yang.

But today, Nautilus apparently has completely lost the ability to attack. Xiang Yang's finger flicked it, and it just tightened its shell, and then continued to play dead.

Xiang Yang suddenly sighed, thinking about ancient times, in the prehistoric ocean at that time, most creatures could not bite through the shell of the straight-shelled nautilus. For this reason, this creature once dominated the ocean for a short time in the Ordovician. Even the prehistoric trilobites at that time, in order to avoid being eaten to extinction by this giant creature, they also evolved long and hard stingers to resist the hunting of the straight-shelled nautilus. This shows how powerful the Nautilus ancestors were.

On the other hand, the current Nautilus is not big, and it is not at the top of the food chain. Coupled with a large number of human hunting and even facing the danger of extinction, it is really not as good as it used to be.

Xiang Yang teased the Nautilus for a while, and the Nautilus was always shrinking his head, and gradually Xiang Yang lost interest in it.

"Forget it, I won't scare you anymore." Xiang Yang stood up and began to look at other marine life around.

A giant sea cucumber and an almost extinct living Nautilus were discovered in this sea area. Xiang Yang is now more and more interested in this sea area.

Although Xiang Yang couldn't catch Nautilus because it was protecting animals, Xiang Yang was not without harvest after this trip, because he found a sea area that seemed to be rich in rare fish.

After Xiang Yang got up, the Nautilus at UU Reading www.uukanshu.com poked out his head cautiously, and then crawled forward slowly.

Seeing Xiang Yang didn't mean to pay attention to it, the Nautilus immediately became happy, and saw it swaying quickly, then drifting around in the sea water, quickly swimming away.

Of course Xiang Yang saw that Nautilus escaped, but he couldn't catch it, and getting close would scare the Nautilus, so Xiang Yang ignored the escaped Nautilus.

This seabed, the vast expanse of whiteness, the fishes living in this sea area, as well as the snails and shells, are mostly white, so even Xiang Yang’s eyesight is very good. It is difficult to find any valuable marine products in the vast expanse of whiteness.

This kind of feeling is like looking for a white rabbit in the ice and snow, even if it is lying in front of people, it is difficult to find it if you don't look carefully.

Of course, Xiang Yang is not in a hurry. The harvest he has come out of this trip is already very rich, and he is not in a hurry to catch more valuable marine products. He has time to find it slowly.

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