1, look at the goldfish's belly

Look at the goldfish's belly. If the bulging goldfish is pregnant, this one is the mother fish. But not during the breeding season. Also consider whether goldfish is sick to get pregnant.

2. Look at the body shape of goldfish

First of all, we can start with the body shape of goldfish. Adult male goldfish are as slender as willow leaves, while female goldfish are often short and fat. Put a jar of goldfish together and compare them, and you can quickly see the male and female goldfish according to their size. This is an important foundation.

3. Look at the goldfish's tail

Male goldfish are thicker than female goldfish, especially at the tail. The tail of male goldfish is wider and flatter, which is obviously different from that of female goldfish. Obviously, people can tell at a glance.

4. Observe the swimming of goldfish

Male goldfish swim faster. Swim fast, too. The female goldfish is very docile and swims slowly.

Step 5 observe the color of goldfish

If you carefully observe the appearance of goldfish, the color of male fish is more vivid.

In addition, the color of goldfish is also a sign of health. If the color becomes lighter, it means that the fish may be in a sub-health state. If you change water or feed colorful fish food immediately, the goldfish can recover its bright color in the shortest time.

6. Observe the cloakroom of goldfish.

Turn the goldfish over and observe the spawning holes in the fish's stomach. The spawning holes of male fish are long and narrow, while those of female fish are large and round (ovulation). This method is the most accurate method to judge the male and female goldfish.

7. Observe the fins of goldfish

The fins of male fish are different from those of female fish, and they are thicker. If a goldfish's fin is curved and thick, and meets the above characteristics, then this fish may be a male fish.

Female fish have shorter fins. In addition, it is also good to see idolization during the breeding period. All the idolized (small white spots) are females.

Extended data:

Feeding time and method:

The feeding time of goldfish, whether it is live feed or artificial feed, must master the following principles:

1, the feeding frequency is only 1-2 times a day, and the feeding amount should be finished within 1-2 hours. The feeding amount of species with normal weather and water quality and strong vitality can be increased appropriately.

2. Feeding time should be as early as spring and summer, usually around 6-7 am, when the sun begins to shine and the fish ponds (tanks) begin to feed. Feeding time can be delayed in late autumn and winter, usually around 7-8 o'clock, and even delayed to 10 in winter.

But don't eat too much at night. Even if the fish are obviously foraging, it is best to feed them in small quantities around 3 pm. 1 1 month later, the water temperature dropped obviously, and the appetite of goldfish decreased, especially at night.

3. With the growth of goldfish, the food intake should be gradually increased appropriately, but it should not be blindly fed, especially artificial feed, which should be strictly controlled. In family fish farming, the feed can be divided into 1-2 times a day to avoid excessive feeding at one time, accumulation of ponds (tanks) and deterioration of water quality.

Feeding precautions:

1, choose healthy goldfish.

Healthy fish swim in the middle and lower water, foraging, swimming naturally and leisurely, and the caudal fin is clear, transparent and elegant.

2. Don't rush into the tank after the goldfish is bought back.

Put the plastic bag containing fish in the fish tank 10 to 20 minutes before opening it, let the water in the tank flow back into the bag several times and gradually mix with the original water in the bag, so that the goldfish can gradually adapt to the water temperature and quality. If there is a light, turn it off.

Fish are quiet in the dark and are not easily frightened.

3, can't dramatically change the water temperature.

When buying fish, pay attention to the water temperature of the aquarium and the water temperature of your own aquarium. The deviation should not be too big. Generally within 4℃ is allowed.

4, change water can't be too much.

Fresh water must be stored for a day or two. The purpose is to remove some chlorine from water, and also to make the temperature of new water and old water close.

References:

Baidu encyclopedia-goldfish