"There was a tuna in the fishing grounds. Ao Muyang told Lu Zhizi the news.

Lu Zhizi was suspicious: "True or false? How is it possible, you can still raise tuna?"

Ao Muyang said: "Wait, I'll put on a diving suit for you, so that it can resist the cold, and then I'll take you to the water to see, there is really a tuna!"

Lu Zhizi saw that his expression was serious, so he believed his words, and his face was full of surprise: "Then you must see, isn't the problem of tuna artificial breeding still unovercome?"

This tuna does not dive, so they only need to dive on the surface of the ocean, and the reason why they wear a deep suit is because it is the warmest.

Ao Muyang was still dressed up simply, and Lu Zhizi said, "Aren't you too cold?"

"I'm a firefighter. He patted his lower abdomen and laughed loudly.

The two of them dived into the water and waited around an oxygen concentrator.

It didn't take long for the bluefin tuna to appear.

It wandered slowly around the oxygen generator for two minutes, swimming in a spiral course, first swimming from the depths, slower and slower, and finally when it came to the oxygen generator, the slowest speed.

Then, it leaves the oxygen generator and goes to the next oxygen generator, diving again, increasing its speed again, gradually increasing until it swims next to the next oxygen generator, and then repeats the process......

Lu Zhizi surfaced and exclaimed, "Really, this is really a tuna, or a bluefin tuna, I've seen it in Boston, but I've never seen it alive!"

Ao Muyang was triumphant: "How about it, it's amazing, I raised a bluefin tuna!"

Lu Zhizi said excitedly: "This is amazing, where did you get this bluefin tuna?"

Ao Muyang lied: "It jumped in on its own, right? I don't know, anyway, when I came over this time, I found this fish." I was stunned, I guess I jumped in from outside, after all, there are a lot of fry in this fishery, and this is all food for them. ”

After thinking about it, Lu Zhizi said: "If that's the case, then there should be bluefin tuna around, they often like to walk in groups." ”

Ao Muyang said: "The others may have left, right?"

Lu Zhizi said: "You wait first, I'll recall some information about tuna first." ”

She swam back to shore and said slowly, "This season, bluefin tuna should go to the southern hemisphere, they are subtropical and tropical fish, they go to the southern hemisphere in winter, and then migrate to spawn in spring and summer. ”

Ao Muyang knows that most fish, like snakes, are cold-blooded creatures, that is, their body temperature will change with changes in the external environment, but the temperature of the ocean is relatively constant throughout the year, so their body temperature does not change much throughout the year, unlike the cold-blooded species in mammals that need to migrate or hibernate in winter.

However, tuna is one of the few hot-blooded species among fish, and their body temperature can reach 34 to 36 degrees Celsius, especially the muscles and skin on both sides of the spine have a large network of blood vessels, making their metabolism particularly vigorous.

In this case, in order to better conserve heat, they prefer relatively high water temperatures and prefer tropical environments.

Lu Zhizi continued: "This tuna appears around in winter, which means that there is a hot water temperature around, or rather, there is a warm current here!"

Ao Muyang nodded: "You're right, I just found that there is a warm current here, so I built a fishing ground here." ”

Hearing this, Lu Zhizi snapped his fingers: "That's right, I remember that tuna have a habit, although they will sail a lot of miles in their lives, they can make a short stay in a comfortable environment." ”

"They also have a habit of preferring floating objects to gather on the surface, and we can use this habit to find out if there are other tuna in the sea. ”

Ao Muyang asked, "What is the tendency of floating objects on the sea to gather?"

He didn't know this, he only knew the first half of what Lu Zhizi said, that is, tuna can stay for a short time in some environments.

For example, the yellowfin tuna in the Pacific Ocean swims to the edge of coral-lined islands during the day, then goes offshore at night, and returns in the early hours of the morning, constantly migrating through the ocean......

Lu Zhizi explained: "It's when the tuna find something floating on the surface of the sea, such as wood, plastic debris or some buoy, and then they will gather in this place for a while. ”

"Do they still have this habit?" Ao Muyang heard for the first time.

Lu Zhizi nodded: "Yes, science explains that these floating objects make the sea surface rich in three-dimensional space, and the tuna swims next to these objects to find a reference to determine the coordinates of their voyage, so as to correct the navigation route." ”

"Seems so," she wasn't sure about it, and after a moment of thought, she continued, "yes, some tuna anglers used this to lure tuna when I was in Boston, and they artificially created floats on the surface of the sea to attract tuna. ”

There was already an Internet signal on the island, so Ao Muyang checked the Internet and found that what Lu Zhizi said was right.

After the information was verified, Lu Zhizi came up with an idea: "Let's find the warm current waters in the ocean, and then create some floating objects near the warm current waters, maybe we can attract tuna to come." ”

This is a good idea, Ao Muyang immediately said: "I know the sea area through which the warm current flows, so I will go and prepare floating objects." ”

Lu Zhizi said: "Don't get your hopes up, maybe as you said, this school of fish has already left here." ”

Ao Muyang wasn't worried about this, because he had seen this school of fish just half an hour ago.

It was easy to make a float, he found some wooden planks and tied a float to the surface of the sea along with the raft and fishing boat, creating a large piece of float.

The next thing is to wait patiently, the sea is windy, he asked Lu Zhizi to go back to the house to read and rest, and wait on the sea fishing boat by himself.

After Lu Zhizi left, he jumped into the water, and the water was steamy and warm, which was really comfortable.

He saddled the tiger, and if any more tuna appeared, they would strike together.

In order to enhance the allure of the floating object, he also tied a lot of squid, pike crab and fish meat around it, which are all tuna food, to enhance the temptation.

He had just finished his work in the water, when suddenly the motorboat drove over, and he knew that it should be Lu Zhizi on it, so he quickly turned over and got on the boat.

Lu Zhizi didn't ask him why he kept soaking in the water, and said directly: "Mobile phone, Mr. Yan of the blue boatman is looking for you, saying that he is looking for you to save his life!

Ao Muyang hurriedly took the phone and asked, "Hey, Mr. Yan, Zhu Zhu has been kidnapped again?"

"No, Xiao Ao, come to the municipal hospital, Zhu Zhu is sick, God! you come to save Zhu Zhu's life!"