A small black goldfish with a triangular tail

Don't put it next to your computer, you guessed it, radiation has an effect on it.

If the tail is broken, put some gentamicin in the water, and put some large grains of salt after changing the water a lot. It's okay to keep the water quality good.

1.In addition to eating artificial bait, I prefer to eat bloodworms, snakes, jumping insects, etc., to ensure that the bait is fresh, and the spoiled ones cannot be fed.

2.Feed 1 time a day, feed at a fixed time, goldfish do not know hunger, so each time feed eighty percent full, feeding within five minutes is appropriate. Fish can grow healthily and keep the water fresh for a long time.

If you feel that feeding once is not enough, you can also feed it twice, but take the form of eating smaller meals and more meals, feeding five minutes at a time, and once in the morning and once in the evening.

3.Goldfish is a cold-blooded animal, so it is not afraid of cold, but since you are kept indoors, I believe that the temperature should not be very low, generally the water does not freeze, it is fine, but try to keep the water temperature constant, hot and cold will definitely catch a cold.

4.You can't use tap water directly to change the water for fish, because tap water contains too much chlorine, and the tap water can be used after three days (called trapped water).

5.If there is no filter, it is necessary to suck out the fish feces on time every day, and then add the same amount of trapped water as the sucking out, so that the water can be changed only a little, and the water can be kept clean and the oxygen is injected. Put the trapped water next to the fish tank a few hours before the water change, so as to ensure that the new water to be replaced is kept at the same temperature as the water in the fish tank, and the fish will not be irritated.

Hello, it's okay to put it on the computer desk, to ensure that the water quality is good and the dissolved oxygen is high, and feed some fish food regularly, it's okay. It doesn't matter if the fins are broken and will grow.

The fish with black spots on its tail is a totoaba fish.

Totoaba is generally called yellow croaker, yellow croaker, and king fish in folklore. There are two kinds of big yellow croaker and small yellow croaker, the adult body length of large yellow croaker is about 40-50 cm, the small yellow croaker is less than 30 cm, the body is yellow on the back, the head is large, the tail is narrow, it inhabits the open sea, swims back to the offshore sea to spawn in spring, and the swim bladder can make sounds.

Totoaba is one of the four major marine economic fish in China. Since the Ming and Qing dynasties, the yellow croaker is a tribute to the imperial court, and Zhou Chuliang, a famous scholar in the late Qing Dynasty, wrote a poem for it: "The white flower is not as good as the yellow flower, and the gills are clearly distinguished. In modern times, it has become a common delicacy on the table of ordinary people.

There are some goldfish that have two tails, but in fact they are goldfish tails forked, so it looks like they have two tails.

Goldfish originated in China, and before the Ming Dynasty, goldfish were also known as golden crucian carp. At that time, the tail of the goldfish had not yet branched, and it was not until the late Ming Dynasty that the tail of the goldfish began to split into two forks. In the Qing Dynasty, the tail of the goldfish began to be divided into three to four forks, because of the difference from ordinary fish, and they are extremely ornamental, so many dignitaries and nobles at that time liked to place a porcelain in the hall, and the porcelain raised a small goldfish.

Before the Ming Dynasty, the tail of the goldfish was not forked, and the golden crucian carp was not paid attention to at the beginning. In the Ming Dynasty, due to the improvement of the level of life and culture, as well as the budding of capitalism, many gentry and bureaucrats had a higher and higher demand for material culture. "Natural selection, survival of the fittest"。

After the people caught the golden crucian carp, they sold these wild golden crucian carp to bureaucrats and dignitaries, with the captivity of these people, the golden crucian carp gradually showed a pathological genetic mutation, in order to adapt to the domestic environment, the golden crucian carp through genetic mutations, became the two-pronged tail of the Ming Dynasty, and gradually appeared in the Qing Dynasty.

Originally, the tail of the goldfish was like most fish nowadays, with only one tail, but after thousands of years of evolution, the tail of the goldfish began to become wider and wider, and it was split into two sides that were split in the middle and symmetrical on the left and right, so it looked like there were two tails.

The goldfish does this mainly to confuse the predator, so that the predator cannot tell which is its real tail.

The reason for degradation and evolution, or the problem of genes, after all, rats give birth to nine children, and the nine children are different, so it is largely because of genetic problems.

—— It is a species of grass goldfish golden carp swallowtail, with a short body and a long tail, red, white and yellow, as well as red and white, glass color and color dovetail, etc. Grass goldfish, also known as golden crucian carp, is the ancestor of goldfish.

There are many varieties of goldfish, which are mainly divided into two categories, dragon species and egg species. Generally speaking, dragon goldfish have longer and more beautiful tails (e.g. common dragon eyes), while egg goldfish are relatively fat and have shorter tails.

1. It is very likely that the tail is injured and blackened by the mold infection in the water, it is recommended that the owner change the water and isolate the injured goldfish to avoid infecting other injured goldfish.

2. Usually bask in the sun for goldfish, and replacing the water in time can generally effectively prevent this problem.