The facts are hard to believe about goldfish

If you still think that goldfish only has "3 seconds" memory, think again after reading this article.

Goldfish - Carassius auratus - scientific name is one of the freshwater fish that humans have domestically since very early, started from China 2,000 years ago. With a gentle nature, as well as an eye-catching shape, this fish becomes one of the most popular pets in the world.

And did you know that this lovely fish also has unexpected secrets that few people think of?

1. Chinese Song Dynasty - goldfish must be true yellow

There is a name for "goldfish" , but perhaps everyone knows that the true color of this fish is orange. However, not everyone likes it, especially in the Song Dynasty.

In 1162, the Song emperor at that time gave the decree to all the subjects: Prohibiting the goldfish of yellow color (real gold). The reason is that it is the "lemon" color that is reserved only for the dynasty.

2. America - the popular goldfish boss thanks to the government

According to The Atlantic, the US Fish and Fisheries Commission approved the import of Japanese goldfish in 1878. They even organized free " fish " sessions to attract the attention of people in Washington DC Not only adopted for free, people also get one more goldfish tank.

As a result, within a year, the US government released about 20,000 goldfish. And by the end of the campaign (throughout the nineteenth century), a total of one third of the US population possessed this lovely fish.

3. The pet boss in the White House

Former US President Grover Cleverland is a goldfish enthusiast, before the fever in the late 19th century. At the time, he entered Washington about 100 different goldfish species.

Cleverland is not the only case of fish farming. After President Ronald Reagan's failed assassination in 1981, a 10-year-old boy gave Reagan a goldfish, with a cute note: "Hope you will get better soon, this is the person. Your partner . just give him a good meal every day. " The fish was kept in the White House, with the name Ronald Reagan II.

4. Teaching and playing - not only dogs, but goldfish can do it too!

It is said that the goldfish only has a short memory of 3 seconds, but this is completely wrong.

According to Professor Colum Brown's ecology-behavior, goldfish are smarter than we thought. Only 5 times "teaching", can be taught to classify colors, go pick up things, or swim out of love also.

5. Feel the music

Thanks to the easy-to-train element, goldfish are often chosen for animal experiments. In a study by Keio University (Japan), goldfish series were taught to distinguish the differences in the works of two classical musicians.

A group of fish will be taught to take the food when they hear the work of composer Johann Sebastian Bach. The experiment will be similar to the second group, but with musician Igor Stravinsky. And when switching back to the music, both groups of fish are not biting food anymore - showing their clear perception between the work of two different musicians.

6. The life of goldfish can be up to 43 years

In addition to breeding factors, the issue of care and nurturing goldfish can increase their lifespan. Record of the oldest Tish goldfish - died in 1999 at the age of 43.

According to Tish's owner, the secret to achieving this amazing life is to give the fish exposure to the sun when possible, as well as a proper feeding regime.

7. Breeding goldfish in small tanks - may be banned in Italy

According to Humane Society, first-time goldfish owners must buy a 20 gallons tank (about 75.7 liters) or more to make them comfortable.

And yet, in 2004, the southern Italian city of Monza banned the breeding of this fish in small round tanks. And a year later, the government in Rome also enforced a similar ban, to create a comfortable habitat for this lovely fish.