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The growth and development process of goldfish is as follows: 1. Embryonic stage: refers to the period of time from the beginning of the fertilized egg to the hatching of the fish. 2. Juveniles: refers to the small fry that have just hatched from the fertilized egg to the yolk sac.
4. Juvenile fish: goldfish with a body length of more than 3 cm and a growth of more than 2 months. At this time, the body development of the fish is basically formed, the characteristics of each fin are more obvious, the body color is gradually distinct, and only the gonads have not yet matured.
5. Adult fish: After culture, the juvenile fish have fully developed and matured their gonads, and secondary sexual characteristics appear during the breeding season.
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Newborn goldfish don't eat, and there is a yolk sac on the stomach that stores a lot of nutrients that are not absorbed, and it looks like a small tadpole, which is only three or four millimeters long, and it will not eat at this time. After absorbing the yolk sac, the small fry become thin and straight, at this time there may be five or six millimeters long, and then they begin to eat, eat some plankton, such as rotifers, paramecium, daphnia larvae, etc., some people use cooked egg yolk, the effect is poor, at this stage, as long as the food is sufficient, grow very, very lumpy, the naked eye can see a day, lengthen, widen, tail lengthen, grow to 1 cm, fast small fish can be as long as 3 days, slow growth 1 week is enough. How to catch paramecium and rotifers?
Buy more than 200 mesh nylon nets, make net pockets, go to clean ponds, small river bays, the insects caught are not visible, quickly put them in the water and take them home, turn off the lights and watch the flashlight to observe, you can see it, it is extremely small. Or you can take another tank of water to bask in the sun when the small fish hatch, and add some water fleas bought in the flower and bird market, don't be greedy, you can see a few but not a lot of them gather together to swim. By the time the small fish hatch, there are plenty of daphnia larvae to eat.
If you have not raised small goldfish fry, it is recommended to start raising only one or twenty fish fry, do not be greedy for good fish, because it is extremely troublesome for ordinary enthusiasts to prepare food for small fry, and the water quality is easy to deteriorate and the fry are easy to get sick when the density is large. When you have gained experience, it will be too late to raise more.
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Then you have to wait, if you raise it well, it will take about 10 months.
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If the baby goldfish is raised well, the goldfish can grow about 8 centimeters a year. If you want goldfish to grow well, you can eat less and more meals when feeding, and raise them scientifically. Supplement goldfish with high-nutrient foods, such as shrimp, earthworms, bread worms, etc.
These foods can be a protein supplement. You can also feed cooked millet, as millet is rich in vitamins and minerals, which can boost the goldfish's gastrointestinal digestive system. It is also necessary to provide sufficient oxygen so that the lack of oxygen does not affect the growth of goldfish.
If you are raising multiple fish together, it is best to choose a larger tank, too small will affect their swimming and make them not get good exercise. Over time, this will affect their growth rate. It is also necessary to ensure that there is enough oxygen so that the goldfish do not lack oxygen.
You should also pay attention to food and give them more nutrients.
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If the little goldfish grows fast, it can grow one centimeter a year.
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Goldfish can grow about 8 cm a year as long as they are raised well, but it is still directly related to the species of goldfish and the method of feeding. If goldfish want to grow well, they need to eat small and frequent meals, and the density in the tank also needs to be controlled. It is also necessary to ensure sufficient oxygen, supplement more protein to the goldfish, and feed a little live feed to help the goldfish grow taller.
Small goldfish can grow about 8 cm in a year, but it still depends on the variety and feeding techniques, generally gilded, Thai lion and other goldfish will grow slightly bigger, can grow to about 20 cm.
Goldfish in the process of breeding want to grow well to eat less and more meals, scientific planning of the diet, the best density of the fish tank is not too large, polyculture of multiple fish will affect the growth of goldfish, the fish tank is too small will also limit the growth of goldfish.
It is also necessary to maintain sufficient oxygen to prevent goldfish from hypoxia, and add more protein to goldfish in terms of feeding, such as bread worms, earthworms and other live feeds are more nutritious and can be fed more, and it is also convenient to clean up, which helps goldfish grow taller.
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Probably between 25-26 cm, at least 3 liters of water to raise 1 cm long fish, if the tank holds 100 liters of water, then you can feed 3 fish of 10 cm, 5 6 cm fish (its body size is relatively narrow) can raise 8 fish.
It is advisable to eat once to twice a day and within 5 to 10 minutes, feed less on rainy days, do not feed at night, fish need to consume more oxygen when digesting food, rainy days and night air pressure is low, and the oxygen dissolved in the water is also low, so feeding the fish may lead to serious hypoxia in the water and dead fish.
Most of the dead fish occur at night, the main reason is the severe lack of oxygen in the water, according to the color of the fish feces to distinguish the goldfish hunger saturation digestion and absorption: fish feces are green, brown or black, indicating that the fish body is suitable for feeding and good absorption. If the fish droppings are white, it is a sign that the fish is overfed.
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Depending on the size of the tank, the larger the water surface, the bigger the fish will grow. As the saying goes: the king is raised in a can, and the more he raises, the more he draws. The fish is raised in a small bottle, and it will not grow much for the rest of its life. But the big fish pond in the goldfish breeding base will grow up a slap in a year.
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The growth rate of goldfish is related to the species of goldfish and the environment in which they live. Factors such as water temperature, water quality, feeding, and the size of the water body can all affect the growth rate of goldfish. Different species of goldfish grow at different rates, ordinary goldfish can grow less than 1 cm in a month at the age of vigorous growth, and can grow about 8 cm in a year.
But a fast-growing variety like gilt grows about 12 centimeters a year.
Goldfish grow fast when the environment is very suitable. The growth rate of goldfish has a lot to do with the growth environment of goldfish, and factors such as water temperature, water quality, and feeding are all very important. The size of the water body is particularly important, not only affecting the growth rate of the goldfish, but also the size of the final body size of the goldfish.
For example, goldfish that grow in a fish tank are basically smaller than those in a pond. For example, grass goldfish can generally grow to 10-20 cm in a fish tank, but if they are grown in a pond, they can grow up to 40 cm at the longest, and generally grow to 20-30 cm.
In addition to the growth rate of goldfish, which is closely related to the environment, it also has a lot to do with the species of goldfish. Ordinary varieties of goldfish can grow about 8 centimeters a year at a vigorous age, and the average is less than 1 centimeter in a month. Some varieties of goldfish, such as gilding, can grow about 12 centimeters a year, and the growth rate is much faster.
Different species of goldfish also have a lot of final body size, for example, grass goldfish can generally grow to 10-20 cm in the fish tank, dragon goldfish can generally grow to 15-20 cm, and egg goldfish will be a little shorter, usually only 10-15 cm.
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