Research on "how is the memory of goldfish" continues. Previous research concluded that goldfish have only 3 seconds of memory. So how long do goldfish have memory?

Scientists in the UK have found that at specific times of the day, goldfish can learn to push a lever to find food. In another study, two goldfish that had fought were placed in a tank where the other goldfish was.

For a long time, the goldfish that had lost the battle still dared not approach the winning goldfish. Apparently it Also very afraid of being attacked by the winning goldfish.

In addition, some scientists have done an experiment: the fish tank is separated from the middle by glass, a hole is opened in the middle of the glass, and the space where the goldfish does not have a goldfish is used to catch food with a rope, that is, the fish can eat food only after drilling through the hole.

After a few groping, the fish burrowed and ate something, and the experiment continued for a week; after a week, the glass was removed, and the fish still ate by drilling a hole.

The experiment proved that they are indeed very smart and have long-term memory ability.

Now researchers have discovered that goldfish have a very long memory.

Raymond Lowe, a veterinarian from Australia, said: "People must think this is very strange, but goldfish owners and all veterinarians need to re-understand and take goldfish seriously."

If you have goldfish too, remember to treat them well, their memory is more than a few seconds! So how do you care for goldfish? Here are some tips for your consideration.

Prepare a large enough fish tank. A goldfish needs a fish tank of at least about 120 liters to 150 liters in size. If they don't have enough space, their bodies don't grow any more in order to survive, but their organs continue to grow.

For each additional fish, you need to add about 40 liters of space. Study all species of goldfish carefully and learn about their growth.

Prepare the fish tank before buying the fish. Preparing a suitable environment for goldfish to grow takes a certain amount of time and effort. It takes a lot of work to control water quality and create a good living environment. Here are the specific methods:

Fish is a very sensitive creature, and changes in the environment can make it nervous. Even if the environment is suitable for survival, large changes in a short period of time can cause fish to die.

So don't keep transferring fish from one container to another.

Goldfish cannot stay in small, simple environments such as plastic bags or small water basins for a long time. An hour is ok, a few hours are not great. And a day or so is the limit a goldfish can take.

Set and light the tank. Choose a tank with lights, or buy professional tank lighting. Ordinary light bulbs or desk lamps are difficult to meet the needs of lighting. Goldfish are always active during the day, so they need light to maintain a healthy routine.

Without adequate sleep or sunlight, the fish will fade and become dull. In the absence of natural light, in order to simulate normal day and night, the fish tank should be given 8 to 12 hours of light per day.

However, never place the tank in direct sunlight. Not only can this cause large fluctuations in temperature, it can also lead to wild growth of algae.

You can also put some water plants, rockeries, and stones in the fish tank to create a relatively fresh environment. Water plants can purify water and provide some oxygen, and rockery stones provide them with a place to play.

If conditions permit, you can also buy a heating rod, the goldfish will live more comfortably, and a constant water temperature is also very important to the overall survival rate of the goldfish.

It is best to use a filter system for raising goldfish, but this filter system does not necessarily have to come with the fish tank, and you can choose it separately.

If there is a filter system, it is easy to clean, and it will not be too troublesome when cleaning. This also makes it easy to keep the interior environment of the aquarium comfortable.