CATDOLL : CATDOLL: How do octopuses grow and reproduce?

How do octopuses grow and reproduce?

Octopuses have very special reproductive characteristics, and they can only reproduce once in their lifetime. Octopuses belong to the mollusk class, and after mating and laying eggs, both male and female octopuses will lose their appetite and die after about a week.

During the breeding season, the female octopus lays a bunch of crystal clear, plump grape-like eggs. From then on, she will guard her beloved baby closely, often using her tentacles to turn and touch the shiny eggs, and spraying ice from the funnel to wash each one. Even when the baby octopus hatches from the eggshell, this "loving mother" is still worried that her beloved child will be bullied by other marine animals, and still refuses to leave, and finally becomes very haggard, and some even die from overwork.

Octopuses are ferocious, cruel, and cunning. It is very dangerous for people who go to sea to encounter them. However, people still have a way to deal with them. As long as you quickly cut the nerves slightly above the octopus's eyes, you can get out of danger. The meat of octopuses is tender and delicious. Fishermen often drill a hole in the shells according to the habit of octopuses to drill into shells, string them together with ropes and sink them to the bottom of the sea. When the octopus drills in and makes a home, they pull it up. In this way, they can catch some octopuses without much effort.

Octopuses have a very strange way of reproducing, and females often kill males to do so.

What would our life be like without animals?

With the advancement of science and technology and the development of the times, a new era of ocean development has arrived. In the development of the ocean, people will more effectively obtain more wealth from the ocean. More and more countries are planning to build or have already built underwater farms and underwater pastures. People are gradually transitioning from the past era of simple ocean fishing to the future era of "cultivating the sea". In the near future, people will work better and more effectively in underwater farms and underwater pastures than in farms and pastures on land, because the unit output of marine aquaculture is 100 times higher than that of land planting for the same area. People will cultivate a large number of seaweed and seagrass to supply cattle, pigs, sheep and other animals on land as feed, thereby obtaining more protein. The total output of the world's underwater farms will soon jump from the current 20 million tons to 50 million tons. A large amount of seaweed and seagrass will also be harvested by underwater combine harvesters and then hoisted onto ships by steel cables.

In the near future, the fishing nets that people have used for generations will be replaced by powerful water-absorbing devices. The light emitted by the electric field, the sound of a certain frequency and the special compounds dissolved in the water can be used to lure and force the fish to gather together and swim close to the water-absorbing pipes lowered on the ship. The water-absorbing pipes suck the fish and water into the cabin. By then, together with the various fish and shrimps provided by the seabed ranch, the seafood obtained from the ocean will reach more than 1 billion tons, which is more than ten times or even dozens of times more than what is taken from the ocean now.

With the increasing demand for resources such as oil and natural gas and the large-scale exploitation of these resources, these resources on land will be increasingly exhausted. People will inevitably turn their attention to the ocean or look for new energy sources. It is estimated that the oil reserves on the seabed are about 90 billion tons, and the oil reserves in the Arctic Ocean alone can be used by the world for 50 years. At present, more than 100 countries and regions have carried out exploration and exploitation of continental shelf and deep-sea oil, and more than 500 oil and gas fields have been discovered. The implementation of a ten-year world ocean edge drilling plan is nearing its end. Explore and exploit submarine oil, and build a production base on the seabed. For the transportation of submarine oil after exploitation, people will use large submarines. Imagine sinking a giant plastic cylinder to the bottom of the sea, filling it with 100,000 tons of crude oil, and towing it by a submarine. Some people also design to use spacecraft for transportation.

There is a huge amount of energy in the ocean, which people call the "blue coal sea". It will be transformed into the energy of the future. The future ocean thermal energy conversion plant will be set up in the sea, and electricity can be supplied to cities along the coast through cables. Heavy water, known as the "future fuel", has a much higher content in seawater than in land water. Hydrogen isotopes can be extracted from heavy water, and scientists are using it to conduct thermonuclear reaction experiments. If successful, it will become an inexhaustible energy source.

In the near future, people will build "underwater cities", which is not a fantasy, but a reality. At present, Japan has built a "small city" swimming on the sea for an Arab country. It is mostly made of steel, with a 6-story building at the center. It has an indoor garden and a cinema, and all water and electricity are self-supplied. It can meet the cultural and entertainment needs of offshore oil workers. This floating "city" is supported by 8 tall pillars. If they are put away, it can be used as a ship. In the future, many offshore factories will be built in the sea near the raw material production site or market to provide material needs for the residents of the offshore city. There is a "sea park" in Longgushi Bay, southwest of Shikoku Island, Japan. People can enjoy the underwater wonders through 16 glass windows with a diameter of 60 cm on the seabed: strange reefs, colorful corals, various beautiful fish and interesting starfish, anemones, etc. Since the United States first built an underwater laboratory, many countries have followed suit and built "steel houses" and other buildings on the seabed. The air pressure in the "house" is the same as that on the sea surface, and people can work normally inside, repair submarine oil and gas wells, salvage sunken ships, conduct submarine exploration or supply submarines, etc. It is also reported that a group of Japanese engineers and architects plan to build the world's first "Ocean City" in the sea 120 kilometers away from Tokyo to solve the problem of future human housing. The Ocean City will be built on the seabed 200 meters deep, with a 4-story steel frame platform, about 70 meters from the sea surface, covering an area of ​​23 square kilometers. The entire city is supported by 10,000 solid straight columns, and there are induction devices near the straight columns. It can detect typhoons, tsunamis and undercurrents, and adjust its strength to resist these external pressures to keep the Ocean City stable. In addition to residential areas, the Ocean City also has a commercial center, 400 tennis courts, 8 golf courses, two baseball fields, 1 artificial field for growing fruits and vegetables, and roads connecting vertically and horizontally. The construction cost of Ocean City is estimated to be 200 billion US dollars. This huge project is expected to be completed by the end of this century. By the 21st century, this "underwater city" will be inhabited by more than 10,000 people. At that time, the deep seabed will no longer be silent, but will become as lively as the mainland. More and more people will explore and build it, and use their wisdom and hands to draw this huge and magnificent blueprint.

The future of the ocean shows people a brilliant prospect. The vast ocean will make great contributions to mankind.

In 2131...

The sound of "pa pa pa" dragged me back from my dream. I rubbed my sleepy eyes and sat up. Oh, it turned out that it was the naughty dolphin Yuanyuan calling me outside the window! I suddenly remembered that I had just moved to this beautiful "undersea pearl" city with my parents from the crowded city last week. The city is a sphere surrounded by a special transparent film, hence the name of "undersea pearl". Although this film looks transparent and soft, it is actually very tough. The fierce scouring of seawater and the sharp teeth of great white sharks can't do anything to it. But the film that people in the city touch is like a thin mist. They can reach out their hands to play and play with crab soldiers and shrimp generals. People can also see a colorful underwater world through the film, all kinds of strange fish, seahorses lined up, octopuses waving their long limbs, and water plants twisting with the water flow...

After breakfast, I said goodbye to my parents and set foot on the crystal passage leading to the school. Speaking of this crystal passage, there is a lot to learn!

This is built with crystal glass pipes, and is divided into three layers: electric racing track, walking track and moving walkway. The most widely used one should be the first layer of moving walkway, which is also divided into four rows, with the speeds of the first, second, third and fourth rows being 50 km/h, 30 km/h, 20 km/h and 10 km/h respectively. It transports thousands of passengers like an assembly line. The second layer is the electric racing track, suitable for car fans; the third layer is the walking track, where you can often see some elderly people walking slowly with their pets; such three-layer crystal channels crisscross the city, which is convenient and fast.

Five minutes later, I arrived at the city center, where there is a huge fountain that looks like a five-story pagoda. It is not only beautiful, but more importantly, it is also the city's oxygen generator. Next to the fountain is a station, or more precisely, a "ball station". People only need to enter a sphere, and the sphere will be controlled by a computer to rise to another underwater city or land. Every weekend, my mother took me to my grandmother's house on this sphere.

Soon, we arrived at the school. It was a book-shaped building, symbolizing that we were swimming in the ocean of books. The school was surrounded by colorful flowers and plants, which were planted with fertilizer jelly. They smelled so good! They also attracted the pencil-shaped butterflies that Dr. A had just introduced!

This is our "Pearl Under the Sea". The reason why there is such an underwater city is that the population on land is increasing day by day, it is overcrowded and the environment is polluted, and the area of ​​the ocean is far larger than the land. Humans have to rely on science and technology to return to nature! I think: since human technology can enable us to settle on the seabed, what will the sky city and Mars garden look like in a few years? We still need to explore and study, and I believe that there will be another style by then.

Knowing that you are from the year 2009, let me be your tour guide and take you to explore the ocean of 2030. I believe you will gain a lot.

As we all know, the ocean occupies seven-tenths of the earth. In 2009, ocean pollution was very serious. But in 2030, due to the development of science and technology, pollution removal robots have become the nemesis of ocean pollution. Therefore, there will be no pollution problem in the ocean at this time.

Now, I will take you to the multi-functional reception room and get on the ocean location changer, which will take us to the ocean world in an instant.

Today's ocean is also the home of mankind. Fifty percent of the world's population lives in the ocean. You must be very curious about how people survive in the ocean. In fact, there is an oxygen control room in the ocean world. Oxygen is produced here and then transmitted to every corner of the ocean through oxygen cylinders. People breathe in fresh oxygen and expel carbon dioxide, which is then received by the oxygen control room and oxygen is produced again...and the cycle continues.

The fish in the sea are even more amazing. Since the sea water became fresh water, the fish have learned human language and can talk to people. It's so interesting! When you get in front of a large group of fish, the fish will say: Good morning! It's unbelievable that fish can speak English.

After I finish my introduction, you will go to the residential area. Although you see a barren land, people live here. The people in the sea are different from the people on land. They have simple food. One simple food pill can last for 100 days, so they are very leisurely. Where do they live? They regard the whole world as their home. They can sleep wherever they want, without worries.

Next, you will visit the palace and the park... They must feel grand and magnificent!

Maybe you are worried that with so many people living on the seabed, will there be any environmental problems? No. The seabed has achieved no factory, but there is production. And the production is by no means worse than that on land. This is because we pass the garbage and sewage discharged from the land to the production robots through the decontamination robots for processing and make various usable things...

How about visiting the strange and wonderful ocean world? I believe you will feel the power of science is so magical.