Who has a very short memory? Detailed answer

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Who has a very short memory? Detailed answer

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Who has a very short memory?

Just not the goldfish.

Despite its notorious status as a supposedly well-known fact, the memory duration of an aquarium goldfish is not three seconds at all.

The results of a study conducted at the Plymouth University School of Psychology in 2003 leave no doubt that goldfish have at least three months of memory and can recognize shapes, colors and sounds. In order to receive a reward in the form of a treat, they were taught to press a small lever; when the lever was adjusted so that it worked only an hour a day, the fish quickly learned to put it into action at the right time. A number of similar experiments have shown that fish in cages can be easily accustomed to feeding at the same time and in the same place - in response to one or another sound signal.

Goldfish don't crash into an aquarium wall not because they see it, but because they use a pressure-sensitive system called a lateral line. Some species of blind cave fish are perfectly oriented in complete darkness with the help of their lateral line alone.

And since we are talking about myths about goldfish, let's immediately note: a pregnant goldfish was not, is not and cannot be a model of "stupidity". Goldfish do not get pregnant - they spawn, which the males fertilize right in the water.

In principle, maybe there is a word for a female spawning fish - something like "doda", "durynda" or "chipka" - but none of them are mentioned in decent dictionaries.

Author: John Lloyd, John Mitchinson

Random interesting fact from the Great Encyclopedia:

Which animals contain natural sunscreen in their bodies?

Hippopotamuses are able to highlight two special skin pigments with pronounced red and orange colors. Pigments perform a dual function: they prevent the growth of pathogenic bacteria and protect from sunlight. In other words, hippos already have natural sunblock in their bodies. Sometimes this pigment manifested on the skin of an animal is called bloody sweat, although it has nothing to do with sweat or blood.

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