How do goldfish divide male and female?

Goldfish is the earliest species in the history of ornamental fish in the world. It has accompanied human beings for more than ten centuries. It is easy to raise, its posture is strange, its color is gorgeous, it can beautify the environment, and it is loved by people very much. In our country, people think that two goldfish are bought at home for the Spring Festival, which means that they will be full of gold and jade in the coming year. Let's take a look at how goldfish can separate their parents.

Abdominal identification

The first reaction of many people to distinguish between male and female goldfish is to look at the belly of the goldfish. If the bulging represents that the goldfish is pregnant, this is the female fish, but not in the breeding season, you can't see it, and you have to consider whether the goldfish has a big belly because of illness.

Body type identification

We can also start with the size of goldfish. Adult male goldfish are as slender as willow leaves, while female goldfish are often short and fat. If you compare a tank of goldfish together, you can soon see the male and female of the goldfish according to their size, which is an important basis.

Fish tail identification

Observing the tail of the goldfish can also tell the sex of the goldfish. Generally speaking, the male goldfish is stronger than the female goldfish, especially in the tail part. The tail of the male goldfish is relatively broad and flat, which is obviously different from the female goldfish.

Swimming distinction

When goldfish swim, you can also see that male and female goldfish swim more agile and fast, while female goldfish are tame and slow.

Color discrimination

If you look carefully at the appearance of the goldfish, the brighter color is the male, and the color of the goldfish is also a sign of whether it is healthy or not. if the color becomes lighter, the fish may be sub-healthy, change the water or immediately change to the added color fish food. the treated early goldfish can restore its bright color in the shortest possible time.

Cloacal observation

Turn the goldfish over to observe the cloaca on the belly of the goldfish. The cloaca of male fish is narrow and long, while that of female fish is relatively large and round (ovulatory). This method is the most accurate way to judge the male and female goldfish, reminding us that we must handle the goldfish gently. The fish are timid and frightened will get sick.

Fin difference

The fins of male fish are different from those of female fish, and they are relatively stout. If the fins of a goldfish are curved and thick, and then accord with the above characteristics, the fish may be male, and the female fish has shorter fins. In addition, it is good to chase stars during the breeding period.

Well, how to divide goldfish into male and female is introduced here. I think we already know how to distinguish the sex of goldfish. Next, let's take a look at how goldfish reproduce.

Selection of species

The quality of goldfish species has a direct impact on the quality of their next generation. 2-year-old goldfish with strong physique, pure variety and good characters should be selected as species. Such goldfish are fully mature and energetic. The male and female of goldfish can be distinguished by observing the "chasing star" of goldfish. "chasing star" is the large white convex grain of sesame growing on the top of the Gill cover and dorsal fin of male fish. Whenever the "chasing star" of male fish is very obvious during the breeding period of goldfish, some males do not "chase stars", indicating that their development is not mature enough and should not be selected as fish species. When the female is mature, the abdomen is often dilated and followed by the male.

Oviposition

After the breeding fish are selected, they should be carefully fed in a large tank, and the appetite of the female fish begins to lose before spawning. A bunch of aquatic plants such as anchovy should be put in the tank, or old brown or hemp shreds can be used instead. When the weather is clear, under the stimulation of male chase, the female lays her eggs on aquatic plants at about 6: 7 in the morning. After two hours, the female fish that have laid eggs should be fished out and raised separately, so as not to eat the eggs. Fish tanks with males also need to change all the water to prevent the secretions left by females from polluting the water quality and leading to the death of fish eggs.

Incubation

Remove the fish eggs together with the water plants, put them in another tank and place them in a ventilated and sunny place. When the water temperature was 13-20 ℃, the transparency of fish eggs decreased gradually after two or three days, and a black spot appeared at the same time. After 3-5 days, the black spot expanded into a circle, indicating that the juvenile fish began to develop. In a few days, the little goldfish will hatch.

Bait

Small fish just hatched, if small needle tip, the body is black, do not eat or move, attached to the bottom of the cylinder, cylinder wall or aquatic plants, at this time to ensure a quiet environment, do not rush to take out the aquatic plants. After four or five days, you can wrap the boiled egg yolk with gauze and squeeze out the egg yolk water to feed the small fish 2 or 3 times a day.

Change water

Small fish hatched within two weeks, because the body is too small, generally should not change water, but to ensure that the water quality is fresh. If you find a small fish floating head, you should immediately fish out the small fish and change the water, which can be changed every 3-4 days. Try to avoid touching small fish when changing water. At the same time, the bait can also be changed from small water flea or cooked egg yolk to fish feed.