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More than a hundred varieties of goldfish domesticated in China have been farmed today. They may be hoping for luck, but the other side says these fish are stupid because their memory is a few seconds. That is, they can’t recall essentially anything.

Scientists were wondering if goldfish have any memory at all. A researcher has proven that he can call back fish to the feeding station by releasing the fish he has trained into the natural water and using a special, known sound.

Another scientist involved goldfish in the experiment. A long time ago, in addition to the inhabitants of the same aquarium, he also moved in foreign fish. He placed a perforated net in the middle of the aquarium. The fish that knew the environment were bolder and left the net because they knew what was waiting for them outside. However, the alien fish did not do so. In fact, they were able to recall it almost a year later. If that doesn’t seem like a big deal, just think about the fact that 11 months of a goldfish’s life is a lot.

In addition, fish also learn that going to the aquarium can be tantamount to feeding. At least if the owner approaches it. Strangers may not be able to hope for food, so they don’t even put energy into swimming there. And some owners also reported that as soon as a stranger entered the room, the fish swam nervously.

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(Source: homepicture.com | Pictures: Pixabay)