Whether it is a box containing gold jewelry or a box containing silver, Ao Muyang has made special treatment, eye-catching colors, and is equipped with chains to facilitate fixing on the saddle of the tiger.

It is not easy to come to Beibu Gulf, and it is even more difficult to come to Beibu Gulf to transport away gold, silver and jewelry, so Ao Muyang strives to search thoroughly.

Some of the caves contain copper coins from the time, many of which are more valuable than gold, but they have been completely destroyed by immersion in the sea.

There are also some treasures of porcelain from the official kilns of the time, which were also destroyed by seawater erosion and plankton parasitism.

In fact, in addition to gold and silver, most of the others, such as porcelain, copper coins, jade, pearls, etc., have been destroyed and are no longer of much value.

After searching the water hole, Ao Muyang conservatively estimated that he had brought back two hundred kilograms of gold!

The specific gravity of gold is too large, the density is too great, as long as the size of a palm, then a piece has a kilogram!

On the contrary, silver is not so much as expected, it is roughly seven or eight times more than gold, but considering that the density of silver is only about half that of gold, then it is calculated that this silver does not weigh a ton.

Loaded with gold and silver, Ao Muyang took the tiger to take advantage of the night to embark on the way home.

From the Gulf of Tonkin to Brick Island, it takes as much as a day and night to drive non-stop at top speed.

Among them, the fishing boat can move non-stop, but the tiger cannot, it must rest, so it is already August after returning to Brick Island.

Fortunately, the road was calm and smooth sailing, Ao Muyang encountered two waves of coast guard, but they both belonged to the Hongyang coast guard detachment, the two sides knew each other, and the other party did not suspect him.

These gold and silver chests were hidden by him in the seaweed jungle of Brick Island, and it was even safer to hide here than under the ancient temple, and absolutely no one could find out that the boxes were hidden in the clumps of algae at the bottom of the sea.

Seeing Ao Muyang's arrival, the old man Ao Zhibing hurriedly said: "Boss, I was just going to tell you about it, we have encountered some problems in the fishing grounds." ”

"What's wrong?"

The old man said helplessly: "That's the case, a big tuna in the fishing ground a while ago spawned......"

Upon hearing this, Ao Muyang was pleasantly surprised: "The tuna has spawned? That's great!"

As far as he knew, little was known about the spawning of bluefin tuna because it had not been scientifically observed. Although Dongying has completed the artificial cultivation of tuna, it has not yet achieved artificial control of bluefin tuna breeding.

What is now known is that wild bluefin tuna spawn at different times in different seas, such as April to June in the Gulf of Mexico and June to August in the Mediterranean.

According to fisheries science, differences in spawning time in the wild are due to a number of factors, such as different environmental factors and genetic variation.

Bluefin tuna spawn in the fishing grounds, but Ao Muyang does not expect his own fishery to complete the artificial breeding of them, but only wants the big fish to give birth to small fish, thus forming an important link in the food chain.

A female bluefin tuna produces an average of up to 10 million eggs per year, and their eggs are buoyant and distributed over considerable distances by surface currents, and then hatch into small fish that can be dispersed almost throughout the entire fishing grounds.

These 10 million eggs may not be able to hatch all of them, but even if they hatch one-fifth, there are still 2 million small fish larvae, which prey on plankton in the water and can become food for large fish, shrimp and crabs.

Seeing that his face was full of joy, the old man smiled bitterly: "What's good, these fish boys have attracted devil eels!"

Hearing this, Ao Muyang's brows furrowed.

Devil eel is the name of the red ocean people for lampreys, Ao Muyang came into contact with lampreys some time ago, when this fish parasitized on the porpoises and let him pick them one by one.

The old man Ao Zhiman said: "About three days ago, a bluefin tuna was always fluttering on the surface of the sea, and I thought it was doing something wrong, but later it was found out that it was parasitic with two devil eels on its back. ”

"Did you get it down?"

The old man shook his head helplessly: "How can you get this? The tuna is always running, and I can't get close at all, but Jin Huizi's girl has good eyes and can see clearly that there is a devil eel on its back." Later, I caught a big yellow croaker and looked at it, and found that there was a devil eel, tell me, why did this thing suddenly appear so much?"

Lampreys are rare to see suddenly, and they are parasitic fish that, although mobile, rarely take the initiative to make long treks to change habitats.

So for lampreys, how far is it a long distance? Ten kilometers counts!

Ao Muyang dared to guarantee that when he opened the fishing ground, there would definitely be no lampls within ten kilometers of the surrounding area, because there were no big fish here at that time, and lampreys had to parasitize on big fish to live.

Old man Ao Zhibing meant that the tuna fish attracted lampreys, and indeed, lampreys could not only parasitize large fish, but they might also catch very small fish seedlings for food.

Lampreys have good eyesight and well-developed eyes, they have a large mouth, and when there are no large fish to parasitize, they will also chase young fish to live.

Ao Muyang felt that this was not the case, and he thought of the huge sperm whale, perhaps these lampreys brought by the sperm whale.

He had not found any traces of lampreys on sperm whales, which was normal, compared to the huge size of sperm whales, lampreys were too small, and sperm whales had many scars, and lampreys could completely hide in the creases of fish skin to survive.

This is not a priority, the priority is to help the bluefin tuna deal with these parasites.

He took a look at the situation and then dived into the water.

The bluefin tuna's swimming route was well documented, and he waited for a rabbit near an oxygen concentrator and soon saw a large tuna coming from both sides of the house.

He released a little gold droplet and scattered it in the water, and the two tuna were immediately attracted.

At this time, Ao Muyang approached them, wanting to catch the gills and help them solve the parasitic lampreys on their backs.

As a result, the bluefin tuna is very afraid of people, I don't know if it is because they eat too little gold drops or because they are so natural, they are not as intimate as tigers and dolphins, and when he approached, the two fish quickly fled.

After several attempts, Ao Muyang failed to succeed, so he could only surface temporarily, apparently relying on his own strength to remove the lamprey from the tuna.

He was thinking hard about how to deal with the arriving lampreys in the fishing grounds, when a phone call came from the village in the evening: Ao Mupeng, who he had sent to monitor the docks in Wangjia Village, took the initiative to contact him.

The phone was connected, and Ao Mupeng said: "Dragon's head, the Tu Slayer Dragon next door to Mala has gone out, how to get it?"