Aquarists who keep goldfish will definitely find that goldfish will fade or even change color after being kept for a period of time. In fact, it is relatively common for goldfish to change their body color. Generally, goldfish will change color in three stages: fry, juveniles, and old age. The editor will give you a detailed explanation of the changes in body color of goldfish at different times.
Goldfish (definite introduction)
The body color of the newly hatched fry is transparent, and then gradually changes to blue-grey. The discoloration of white and streaky goldfish starts earlier. The discoloration of juvenile fish starts one month after hatching. The short discoloration period is 25 days, and the long discoloration period is one or two months. During this period, the goldfish changes from blue-gray to light-skinned, black, light purple, and flesh-colored. From then on, the light purple turns deep into purple, the flesh-colored fish gradually develops black spots to produce a colorful appearance, and the black color turns to white, red. , there has never been a change, the color gradually deepens and becomes black.
The factors that affect the discoloration of goldfish seedlings are:
1. Genetics
The fry are mainly affected by the genetic factors of the parent fish. In addition to eliminating the effect of hybridization, the fry It will take 4 months at the latest to match the color of the fish. Moreover, if the parent fish changes color quickly, the color changing time of the offspring will also be short. For farmers, shortening the discoloration time can save goldfish breeding time, advance the time to market, and thus save costs. Using goldfish that change color early as individual breeding fish may help speed up the color change of this species.
2. Temperature
The higher the water temperature, the faster the goldfish’s metabolism and the discoloration process will also be accelerated. Similarly, reducing the frequency of water changes will also encourage the growth of goldfish. However, if the water temperature is too high, it may cause the goldfish to change color too quickly. If there is no immediate control, some species, such as red-topped white tall-headed ones (Hedinghong), will lose control of the red color on their heads and continue to fade after the body color fades, losing " The aesthetic feeling of “good (red) luck takes the lead”.
3. Light
The discoloration of goldfish is affected by the intensity of light. If the light is strong, the discoloration of goldfish will be accelerated. Use clean water to raise fish because the water has good light transmittance. , it is beneficial for the fry to receive more light, so the discoloration process is faster. However, too strong light will also make the goldfish's body color fade, and the effect is worth considering.
4. Bait
The nutrients in the bait that goldfish eat during the fry stage will also play a role in discoloration. Green water where a large amount of spirulina grows contains carotene, so the color of goldfish in green water is more vivid. In addition, live bait is rich in chitin substances that can reduce the body color of goldfish and have similar effects.
Goldfish (definite introduction)
2. Fading in the Juvenile Age
After passing the first stage of discoloration, the color of the goldfish is no longer close to the body color of the parent fish, but the fading process of some multi-colored goldfish has just begun. The traditional view is that the first stage of goldfish discoloration and the second stage of fading are a process. The author believes that the time for fading to change body color varies. Some complete discoloration within 50 to 60 days, while others take 2 ~3 years. Moreover, the focus of the first stage is to speed up the discoloration, while the second stage is to effectively control the fading process. If you leave it at all abstractly, there is no discussion that facilitates the cultivation of complex goldfish.
For example: after some blue butterfly tails have completed the discoloration in the fry stage, the body color of some individuals continues to fade, resulting in black and white butterfly tails (magpie butterfly tails). The continued fading only maintains the fins and sides of the body. The vertical line represents the famous goldfish species "Panda Butterfly (certain introduction) Tail Dragon Eye". The panda butterfly tail has vertical black lines on both sides of its body. After receding, twelve black butterfly tails are formed, which is also of great value for observation. However, if the black color continues to fade, the body color will become a dull white, and the value of observation Then he fell down greatly. This fading process lasts for a long time, sometimes as long as 5 to 6 years.
Therefore, it is necessary to separate and study this process independently. During the fading process of complex goldfish species, special color distribution will appear. Parts such as: mouth, eyes, and fins maintain the color before fading, while the fish body fades to white or red parts. This kind of goldfish is very popular in the market, and it is given charming names: iron-clad gold orchid, peony Tall head, twelve red (black) lion head, twelve purple (red, black) butterfly tail, etc.
Even though these "types" are an excessive color, if they are raised correctly, this color combination can be maintained for a long time. Therefore, breeders should take appropriate measures to prevent the color from fading continuously, so as to keep the individual body color in the "best" condition as long as possible.
Goldfish (certain introduction)
3. Fading in old age
Goldfish should be raised to 3 to 4 years old Later, most individuals show signs of fading and enter the age-fading period. For example: The original black freckles of streaky goldfish gradually recede, forming red and white varieties.
The black in the body color of the top species of Black Dragon Eye and Black Lion gradually recedes and turns to red. Even the quietest whites and reds have a tendency for the white color to become dim and the red color to turn orange. However, there are also a few individuals whose fading is not obvious, either because of the noble species or because they are raised properly. As goldfish reach old age, they are prone to diseases and are difficult to cure. The average lifespan is only 6 to 7 years, so some individuals can keep their appearance unchanged throughout their lives.
It is normal for goldfish to age and fade. However, if the goldfish does not pay attention to the growth control during the breeding process and grows under high temperature, artificial feed and even hormone stimulation for many years, premature aging will also occur. situation. As older goldfish swim less, the food they feed shifts to fat accumulation, which accelerates the aging process of the fish and makes it difficult to maintain their complexion.
There are still many questions about the discoloration of goldfish. Because there are many cases of hybridization in goldfish, it is still complicated to start from genetics, species, etc. It is precisely because of this that goldfish can maintain their mysterious veil.
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