The result of the investigation into the bizarre disappearance of 800 ornamental fish in the aquarium is a big surprise.

Employees of Shenzhen Ocean World found that most of the 500 ornamental fish placed in the shark pond a week ago had disappeared. This unprecedented phenomenon attracted the attention of the park: where have all the fish gone? The results of the subsequent inventory came as a big surprise.

The purpose of putting ornamental fish into the shark pond is to maintain the shark's natural living condition and enhance the ornamental quality. The park has never seen such a sharp decline in ornamental fish in shark ponds. Sharks are more ferocious fish. they prey on weaker small fishes, and ornamental fish will surely decrease slowly, but it is a bit surprising that hundreds of ornamental fish disappear in large numbers in a week. These ornamental fish are hiding in the scenery of a specially built shelter for them, which can not be seen on the surface: the new fish do not adapt to the new environment, and it is possible for them to nervously drill into the landscape.

In order to find out whether the ornamental fish are still in the shark pond, curator Zhou Yunxin immediately sent staff to take an inventory, especially to search every landscape where the ornamental fish can hide. Some of the doors that could be opened in the landscape were opened, and some of the deeper caves were stirred with a long pole to drive out the ornamental fish as much as possible and roughly count the number.

The results of the inventory disappointed Zhou Yunxin: the ornamental fish really disappeared. Following the dynamics of the shark pond for several days in a row, she did not find any clues, and once again dropped 300 ornamental fish into the shark pond, who knew that two days later, the pond became empty again, and these fish were strangely missing. I don't know where to go: no fish in life, no corpse in death. Even if the fish is dead, there should be a dead body, but if it decays, you can still see some residual fish bones.

A large number of missing ornamental fish have caused nearly 100000 yuan in losses to SeaWorld. Zhou Yunxin and the staff began to find and analyze the reasons. People's first reaction was to be swallowed by sharks, but this idea was soon denied: some of the landscapes in the pool were hollow, some were relatively high, and the hollow places were to provide a good shelter for these small fish: sharks want to attack and prey on them, and they can hide in their own small homes, but larger sharks are generally inaccessible.

Usually, it is not dangerous for a small fish to swim to the mouth of a shark, and everyone goes his own way. In theory, the longer the sharks are kept, the less wild the sharks are, and the staff take the initiative to feed them regularly, so they generally don't bother to hunt any more. Is it true that sharks are getting older and eating more? Zhou Yunxin decided to increase the amount of feed to avoid the possibility that sharks would hunt small fish because of hunger.

It worked a little at first, but not for long, and the fish in the pond decreased significantly in a short period of time.

Just as a large number of ornamental fish continued to disappear, and Zhou Yunxin was at a loss for this, the staff found that some sharks were sick. Zhou Yunxin suddenly lit up in front of his eyes: if these ornamental fish get stuck and die in the landscape, it is possible that the water quality will get worse and worse when they rot. But the test results of the pond water show that although the water quality is poor, it will not lead to the death of a large number of fish, and there are no large numbers of dead bodies to prove that the ornamental fish died in the pond. There is no other reason, but to adopt the method of elimination.

At the suggestion of Zhou Yunxin, Shenzhen SeaWorld revamped the water treatment system: in addition to strengthening the circulation of the biochemical pool, a set of small cycles was added to make the water quality cleaner. But after the transformation, the effect is not obvious.

Aquarium mystery: the shark pond suffered heavy losses but the cause is difficult to identify, and the complicated and confusing investigation has begun.

In order to find out the truth about the disappearance of the ornamental fish, Zhou Yunxin arranged for the staff to take turns on duty, carry out 24-hour round-the-clock monitoring, always pay attention to the dynamics of the shark pond, and report the situation immediately. But even so, the disappearance of ornamental fish has not been stopped: after a week of surveillance, nothing unusual has been found, and ornamental fish are still decreasing. This makes Zhou Yunxin feel more pressure. Until the ninth night of the surveillance, the duty officer was surprised to find that in the same pool where a large number of ornamental fish were missing, several sharks bit a blacktip shark more than 1 meter long with blood dripping and dying.

Shocked, the staff immediately reported the situation to Zhou Yunxin. Zhou Yunxin's first reaction was: this pool is out of order! The shark's sense of smell is so sensitive that it can even sniff out the location of the blood in 1/1000000 concentration of blood once something is bitten and bleed in the water. At this time, a shark was bitten and bleeding in the pond, so how could other sharks not besiege and bite? With so many sharks fighting in the pool, is it possible that you hit me and pounced on the injured shark?

Zhou Yunxin asked the staff to isolate the injured blacktip sharks as much as possible to prevent the situation from getting worse. But when the staff salvaged it, only half the body of the bitten blacktip shark remained. When this never happened, everyone felt that it was relatively safe and dangerous to be with a shark. After what happened this time, everyone was a little scared and felt that being with sharks was not as safe as they had thought.

Aquarium mystery: the shark pond suffered heavy losses but the cause is difficult to identify, and the complicated and confusing investigation has begun.

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