Happy Fishing Farm

Moreover, the original sensory organs of sea anemones have further discrimination capabilities.

Scientists have found through experiments that when the tentacles of the sea anemone touch the artificially placed plastic shrimp, the sea anemone will grab the plastic bag and throw it away after staying for a while.

So the scientists could clearly understand that the sea anemone's nerve cells are sophisticated enough to tell it that plastic is not edible.

This saves the energy that would otherwise be expended in sending the plastic shrimp to the digestive system, where it would be identified.

Of course, this experiment also shows that the information is not spread throughout the anemone's body, because each time the plastic shrimp touches a different tentacle, the capture process will go on again and again.

Each of the anemone's tentacles, which wrap around a common digestive system, can determine the suitability of food it comes into contact with, but have no function of transmitting information to other tentacles.

What does this mean?

It's like saying that a person has two hands.

His brain is very clever, but his left hand doesn't know what his right hand has done.

For example, there is a person who likes to smoke very much.

Once again, the man saw a cigarette butt that had been smoked on the road, and immediately picked up the cigarette butt with his left hand.

That person's brain knew that the cigarette butts that had been smoked by others could not be smoked, so he immediately gave instructions to his left hand to throw away the cigarette butts.

But that person's right hand didn't know that the left hand had picked up the cigarette butt, let alone that the brain had given the left hand the instruction to discard the cigarette butt.

Therefore, when the person's left hand throws away the cigarette butt, the right hand will immediately pick up the cigarette butt again, and the brain needs to issue a command again before throwing away the cigarette butt again.

This habit sounds very miraculous, even a little unbelievable.

But in reality, it's due to the genetic makeup of sea anemones.

Sea anemones look like unique underwater plants, but have long been classified as predators.

From a genetic point of view, the genome structure of sea anemones is similar to human genes, and they are half plant and half animal creatures. At the same time, they also show plant-like characteristics.

Evolutionary biologists believe that the sea anemone gene contains elements similar to those of fruit flies and other animals, suggesting that this type of gene regulation existed some 6 million years ago, dating back to the common ancestor species of flies, sea anemones, and humans .

Scientists also discovered a gene in sea anemones, hyl-1, which is essential for plants to produce microRNA, which had never been found in any animal before.

This study shows that the earliest biological evolution was closely related to microRNA molecules in plants and animals.

&nbThe genome, gene instruction, and gene regulation are strikingly similar to those of vertebrates, but the post-transcriptional gene regulation is similar to that of plants, and its history can be traced back to the common ancestor of animals and plants.

From the perspective of living habits, sea anemones are distributed in all oceans.

Sea anemones are widely distributed in the ocean from the intertidal to the depths of more than [-] meters. Most live in shallow seas and rocky shore puddles or crevices, and a few live in oceanic abysses.

The maximum habitat depth of sea anemones is [-] meters.

Sea anemones account for a relatively large proportion of the benthic fauna in the ultra-deep deep.

Giant individuals of this type of animal are generally found in tropical sea areas, such as the big anemone with a diameter of one meter in the mouth, which is basically only distributed on coral reefs.

Sea anemones have a diverse diet, including molluscs, crustaceans, other invertebrates, and even fish.

After these animals are paralyzed by the barbed wire of the sea anemone, they are captured by the tentacles and sent to the mouth. In the digestive cavity of the sea anemone, they are digested by the secreted digestive enzymes. The nutrients are absorbed by the endoderm cells in the digestive cavity, and the food residues that cannot be digested Discharge from the mouth.

Therefore, sea anemones are coelenterates.

Most sea anemones are immobile.

Some anemones can crawl occasionally, or move in a slow somersault.

There are also some sea anemones that bury themselves deep in the sand, only exposing their mouths and tentacles.

In addition, there are still a large number of sea anemones who like to live alone, and when individuals meet, they often conflict or even fight.

Both often retract immediately after the tentacles come into contact.

If the two are members of the same asexual reproduction line, they will gradually stretch out their tentacles, like friends shaking hands and putting them together, and there will be no hostile reaction.

If the two belong to members of different breeding lines, the tentacles will retract as soon as they touch, and then retract again, and then they will fight with each other and start a fight.

Li Xuan once saw a video of sea anemones of different breeding lines fighting on the seabed. In the video, the two sea anemones first contracted their ring muscles to make their bodies taller, and then pressed their entire bodies towards each other. The moment it overwhelms the opponent, immediately stab the extended nodule towards the opponent.

Sea anemones have large venomous cnidocytes at the top of the nodules, which will immediately shoot out the venom if they stab the opponent.

The two sides always come and go, tit for tat.

After a few minutes, the weak also often take the initiative to retreat and disengage.

If the stronger party is chasing after him, the weaker party will float up and allow the sea to wash him away.

Only when there is no escape route, the sea anemone will be constantly attacked.

When the sea anemone is strongly stimulated by huge waves, the tentacles will shrink, making the whole sea anemone gather into a spherical shape, which looks like a stone.

Some timid ones will even indent directly into the sand on the seabed.

The bright colors of the sea anemones that Li Xuan saw right now are due to the symbiosis of single-celled algae in the sea anemone tissues.

Carbohydrates produced by sea anemones can be used by sea anemones.

In addition to catching small fish and shrimp, single-celled algae are also one of the basic foods of sea anemones.

The sea anemone does not have the ability to take the initiative to attack, but once its tentacles are stimulated, even with a slight swipe, it can mercilessly grab the victim.

The tentacles of sea anemones are covered with barbs, which can pierce the body of their prey.

Its body wall and tentacles have nematocysts, special poisonous organs that secrete a venom that is used to paralyze other animals for self-defense or feeding.

However, the venom secreted by sea anemones is not harmful to humans.

If someone accidentally touches the tentacles of a sea anemone, although they will be slapped and feel stinging or itchy, it is not life-threatening.

If someone picks the sea anemone back and cooks it and eats it, it will cause poisoning such as vomiting, fever, and abdominal pain.

Therefore, sea anemones can neither be touched nor eaten.

But the toxin of this giant sea anemone is very simple. After boiling it in boiling water, its impact on humans is almost negligible. After a certain treatment, it is simply a delicacy.

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