The goldfish is biologically the same species as the crucian carp.

Compared with crucian carp, the goldfish has a great variation in external morphology.

But in general the whole body of the fish can be divided into three parts: head, torso and tail.

The front part of the head is the mouth and the back part has the nose, eyes and gill covers.

Goldfish are gentle in nature and generally live about 6 years, but there are longer ones.

Goldfish belong to an omnivorous carnivorous freshwater fish with well-developed pharyngeal teeth, which can swallow harder bait.

Goldfish have a strong ability to adapt to water temperature, but can not adapt to drastic changes in temperature, its suitable water temperature in 18-26 ℃.

The temperature is too high or too low will affect the feeding and growth of goldfish reproduction.

Goldfish like weak alkaline water, the pH value of the water body in 7.5-8.0 is more suitable.

From a worldwide perspective, goldfish farming is mainly concentrated in Asia, with the largest scale of farming and the widest range of influence in Thailand and Japan.

In addition, Indonesia, Malaysia, Singapore are distributed.

Goldfish are more adapted to group breeding and intensive breeding.

But home breeding can not be too dense.

The ideal water to fish ratio should reach 1000:1, goldfish body length and tank length to reach 1:10 or more.

This can ensure good water quality, dissolved oxygen is sufficient, otherwise the breeding density will lead to rapid water corruption.

Insufficient dissolved oxygen in the water, goldfish can easily die of disease and lack of oxygen.

Goldfish is an ornamental fish domesticated from wild carp.

China is the first country to domesticate the goldfish.

In nature, the body color of the carp is gray on the back and white on the belly, which makes it easier to hide from enemies in natural water.

Sometimes, the pigment cells of the carp mutate and make the fish golden yellow.

If there is no human intervention, such mutated individuals will be eaten by enemies because they can easily reveal their targets.

The Chinese started to discover and use this mutation at a relatively early stage.

In the history of human civilization, the Chinese goldfish has accompanied humans for more than ten centuries, and is the earliest species in the history of the world's ornamental fish.

The goldfish is easy to keep, it has a strange body, brilliant colors, generally golden yellow, and beautiful form.

Goldfish can beautify the environment, very popular with people, is an ornamental fish with Chinese characteristics.

The Chinese goldfish is mainly developed from the carp.

The colorful carp was introduced to Japan and got a lot of attention.

With the efforts of generations of goldfish breeders, the Chinese goldfish is still interpreting the legend of beauty between movement and stillness to the world.

Goldfish in my Chinese folklore there is another saying.

During the Chinese New Year, the family buys two goldfish, meaning that in the coming year, the gold and jade hall, year after year.

Goldfish also have a good meaning of happiness and good fortune.

Keep a goldfish, not only a good symbol, but also to keep alive.