My Deep-sea Fishery

"Whether it's serious or not is not up to me, it has to pass a scientific experiment." Xiang Yang said.

In the ocean, many beautiful and beautiful marine creatures are actually carrying deadly dangers, and if you are not careful, it will lead to tragedy.

Fang Youqun bowed his head and apologized after listening, "Brother Yang, I know I was wrong."

Xiang Yang waved his hand, "I won't talk about you this time, I hope there will be no next time."

After teaching Fang Youqun a lesson, Xiang Yang looked into the water tank again.

In the water tank, the sea god beetle seemed to be able to survive without relying on sea water.

When Xiang Yang looked at it, it was relying on the four leaf-like wings on both sides of its body, pulling hard on the wall of the water tank, and at the same time, its hard body, a little like a cicada chrysalis, was arching and arching.

"It's crawling," Fang Youqun said.

"It wants to crawl out of the water tank," Xiang Yang added.

"Then what sea god slug can crawl?" Fang Youqun asked.

Xiang Yang recalled it carefully, then nodded and said: "It can crawl. The sea god slug can crawl quickly on the seabed by relying on the leaves on its sides and the expansion and contraction of its body."

Poseidon slugs of the Atlantic Ocean are very active and like to dangle below the surface of the ocean.

At this time, Xia Pengjie suddenly asked in a low voice: "Captain, do you see the white foam where it crawled, do they look like the vacuoles of a snail?"

Xiang Yang nodded, "It's a bit similar, but the function should be completely different."

The mucus where the snail crawls is secreted from the snail's gastropods.

Snails live on land and require a very humid environment.

If it doesn't rain, snails hide in the shadow of stones or in the crevices of tree stumps all day long, and only come out at night.

This is related to the fact that the snail's body is very soft and secretes mucus to keep the gastropods moist and avoid damage when crawling.

Therefore, after snails crawl over walls, leaves, etc., they always leave a clear trace, which is formed by the mucus secreted by the foot glands.

As for the mucus left by the place where the sea god beetle crawled, Xiang Yang believed that it was either the venom used to defend against enemies, or the saliva similar to the predation saliva of the sea god slug.

In the sea, many coelenterates have specialized cells called cnidocytes.

Cnidocytes are like spring-loaded harpoons, capable of stinging enemies instantly when in danger.

However, the sea god slug doesn't care about this kind of cnidocyte at all, and can even eat the cnidocyte as a delicacy.

The reason is that the sea god slug can secrete a large amount of predatory saliva to wrap the stinging cells, so that the stinging cells can't hurt it at all.

"Whether it's preying on saliva or venom, this sea god beetle is very dangerous. It's not easy to mess with," Xiang Yang concluded.

Fang Youqun was immediately puzzled when he heard the words, "Brother Yang, if you said that the venom is dangerous, then it makes sense. What do you mean by predating saliva dangerous?"

Xiang Yang looked at the curious people around him, and answered: "The sea god slug can transfer and store those untouched stinging cells at the end of its antennae. Each antennae end can store a large number of stinging cells. These stinging cells are The weapon of the Neptune slug."

"Don't underestimate the cnidocytes, the sea god slugs rely on these small cnidocytes to resist enemies."

In the ocean, cnidarians are feared by many predators.

The brightly colored and soft-bodied Poseidon is active, and it is because of its ability to store stinging cells that few predators attack it.

If any fish dares to prey on the Neptune slug unknowingly, the Neptune slug will instantly pierce all the stored stinging cells into the enemy's body.

This is also the main reason why Xiang Yang Mingming was wearing gloves and didn't care to catch the sea god beetle.

The toxin of the stinging cells is enough to shock a human being, or even directly kill him.

After Fang Youqun learned about the horror of the cnidarian cells, he immediately took several steps back in fright.

Seeing this, Xiang Yang said speechlessly, "Why are you stepping back when you have nothing to do?"

Fang Youqun said, "I'm afraid I'll be stuck by cnidocytes."

Xiang Yang rolled his eyes, "You think it's a bee? As long as you don't touch it with your hands, the stinging cells on its body will never hurt you."

Cnidocytes are a kind of predatory, attacking and defensive cells possessed by cnidarians, but not unique.

To put it bluntly, it is actually a specialized epithelial muscle cell. The nucleus is located at the base, and at the top is a puncture needle protruding from the body surface. As long as you don't touch it, it will not be hurt.

Scientists have discovered through experiments that there is a nematocyst in the cnidocyte, the top of the sac is a cover plate, and the sac is slender and coiled nematocyst.

When the needles or nematocysts are stimulated, the nematocysts are expelled from the nematocysts, and the nematocysts are also turned out from the nematocysts to form nematocysts of different lengths for predation and defense.

Some biologists have proved through experiments that the discharge mechanism of nematocysts is caused by the combined action of mechanical stimulation and chemical stimulation, and using any one of them alone does not cause discharge.

External stimuli act on nematocysts, causing the nematocysts to absorb water from the surrounding cytoplasm, changing the permeability of the cyst wall, and the nematocysts shrink accordingly, increasing the pressure in the nematocysts, causing the nematocysts to break through the cover plate and turn out emission.

Therefore, the discharge of nematocysts is due to the direct action of external stimuli on nematocysts, rather than through nerve cells.

Nerve conduction may only play a modulatory role in the discharge of large numbers of cnidocytes.

The tip of the nematocyst that has been discharged will continuously ooze liquid, which has an anesthetic and poisonous effect on the prey.

Someone analyzed a large amount of nematocyst venom collected from the gastric wire in the digestive tract of a sea anemone, and found that there were four protein components in it.

Then use the four protein components to do toxicity tests on fiddler crabs and ratgu shrimp.

As a result, scientists discovered that some protein components in cnidocytes have poisonous effects, some proteins have the ability to destroy cell membranes and nerve cords to transmit action potentials, and some protein components cause severe convulsions in experimental animals.

This shows that it is caused by the action of the nervous system.

When stimulated, the stinging filaments and venom in the nematocyst of the nematocyst will be ejected immediately, and this process is irreversible.

And like bees, each nematocyst can only be used once, and the stinging cells will degenerate rapidly after use.

Some polyps also have stinging cells on their bodies.

Those stinging cells are generally distributed in the epidermis of the polyp, especially in the mouth area, tentacles and other parts.

Fang Youqun turned to Xiang Yang's right hand, and he blinked a few times, "Brother Yang, I don't know if I should say something."

"Speak." Xiang Yang said.

"Brother Yang, you seem to have caught this sea god beetle with this glove before, why don't you change the glove first, I feel numb when I see your glove now, it seems that there are ten thousand stinging cells Like it's stabbing me."