My Deep-sea Fishery

"I didn't say whether it is serious or not, it has to pass scientific experiments." Xiang Yang said.

In the ocean, many beautiful and beautiful marine creatures actually carry a fatal danger. If they are not careful, they will lead to tragedies.

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, Xiang Yang looked into the water tank again.

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

When Xiang Yang looked towards it, it was relying on the four leaf-like wings on both sides of its body to pull the wall of the water tank with force. At the same time, there was a bit of hard body like a cicada pupa, arching and arching.

"It's crawling." Fang Youqun said.

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

"Then what Seagod slug can crawl?" Fang Youqun asked.

Xiang Yang recalled carefully, and then nodded: "Able to climb, the sea **** slug can rely on the expansion and contraction of the blades and body on both sides of it to quickly crawl on the bottom of the sea."

The Atlantic sea **** slugs are very active and like to hang under the sea.

At this time, Xia Pengjie suddenly asked in a low voice: "Captain, look at the place where it crawled, these white bubbles, do they look like snail liquid bubbles?"

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

The mucus in the place where the snail crawls is secreted from the snail's stomach and feet.

Snails live on land and require a very humid environment.

If it doesn't rain, the snail will hide in the shadow of the stone or in the crevices of the tree stump all day, and only come out at night.

This is related to the softness of the snail's body, which secretes mucus to keep the stomach and feet moist and avoid injury when crawling.

Therefore, after the snail crawls on walls, leaves, etc., it always leaves a clear trace, which is formed by the mucus secreted by the foot glands.

Xiang Yang believes that the mucus left in the place where the Poseidon beetle crawled is not a venom used to defend against enemies, or similar to the predatory saliva of Poseidon slugs.

In the sea, many coelenterates have special cells called stinging cells.

The stinging cell is like a harpoon equipped with a spring, which can instantly sting the enemy when it is in danger.

However, Poseidon slugs didn't care about such thorn cells at all, and could even eat the thorn cells as a delicacy.

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

"Whether it is preying on saliva or venom, in short, this Poseidon beetle is very dangerous, it is not so easy to provoke." Xiang Yang concluded.

When Fang Youqun heard this, he was immediately puzzled, "Brother Yang, if you say that venom is dangerous, you can still make sense. What does it mean to prey on saliva is dangerous?"

Xiang Yang looked at the curious people around him and replied: "The Poseidon slug can transfer and store the untouched stinging cells at the ends of its antennae. Each antennae end can store a large number of stinging cells. These stinging cells are The weapon of the sea **** slug."

"Don't underestimate the stinging cells, the Poseidon slugs rely on these small stinging cells to resist predators."

In the ocean, many predators are afraid of stinging cells.

The brightly colored and soft-body Poseidon is active. It is precisely because of its ability to store stinging cells, so few predators will hit him.

If any fish dared to prey on Poseidon slugs uninterestingly, the Poseidon slugs would instantly pierce all the stinging cells stored into the enemy's body.

This is also the main reason why Xiang Yangming wears gloves and doesn't care about catching this Poseidon beetle.

The toxin of the stinging cell is enough to shock humans and even directly die.

After Fang Youqun learned of the horror of the stinging cell, he immediately stepped back several steps in fright.

When Xiang Yang saw it, he was speechless and said, "What are you doing backing away all right?"

Fang Youqun said, "I'm afraid I will be stuck by the stinging cell."

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

Stinging cells are possessed by stinging cell animals, and are not a unique predatory, attacking and defensive cell.

To put it bluntly, it is actually a specialized epithelial muscle cell with a nucleus located at the base and a needle sticking out of the body surface at the top. As long as it is not touched, it will not be hurt.

Scientists found through experiments that there is a thorny filament sac inside the stinging cell, the top of the cyst is a cover plate, and the inside of the capsule is a slender coiled thorny filament.

When the stinging needle or stinging cell is stimulated, the stinging wire sac is expelled from the stinging cell, and the stinging wire is also turned out from the stinging wire sac to form stinging wires of different lengths for predation and defense.

Some biologists have proved through experiments that the discharge mechanism of the barbed wire capsule is caused by the combined effect of mechanical stimulation and chemical stimulation, and the use of any of these stimuli alone does not cause discharge.

External stimuli act on the thorn cells, causing the thorny filament capsule to absorb water from the surrounding cytoplasm and change the permeability of the capsule wall. The thorny cell shrinks accordingly, increasing the pressure in the thorny filament capsule, and the thorn filament breaks through the cover plate and comes out. emission.

Therefore, the discharge of stinging cells is due to external stimuli acting directly on the stinging sac, rather than through nerve cells.

Nerve conduction may only play a regulatory role in the discharge of a large number of stinging cells.

The tip of the discharged barbed wire capsule will constantly seep liquid, which has anesthetic and poisonous effects on the captured object.

Someone analyzed the venom of a large amount of barbed wire sac collected from the gastric filaments in the digestive tract of an 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 crayfish.

As a result, scientists found that some protein components in stinging cells have toxic and killing effects, some proteins have the ability to destroy cell membranes and nerve cords to transmit action potentials, and some protein components cause intense spasms in experimental animals~www.readwn.com~ This shows that it is. Caused by the action of the nervous system.

When stimulated, the barbed wire and venom in the barbed wire sac of the stinging cell will immediately shoot out, and this process is irreversible.

And like bees, each barbed wire capsule can only be used once, after use, the barbed cells will rapidly degenerate.

Some hydrops also have stinging cells on their bodies.

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

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

"Let's talk." Xiang Yang said.

"Brother Yang, you seem to have caught this Poseidon beetle with this glove before. Or, you'd better change this glove first. When I look at your glove, my heart feels numb, as if there are ten thousand stinging cells. It's piercing me."