CATDOLL : CATDOLL: How to tell the gender of goldfish

1. First, observe the body shape. Female fish are short and round, while male fish are thin and long. If you are raising high-head, tiger-head, lion-head and other species, you can observe their heads. The tumor of female fish is lower and less plump, while that of male fish is tall and full.

2. Next, observe the gill cover. During the breeding season, the gill cover of male fish has sparse protrusions in the shape of dots. The pectoral fins of female fish are short and round at the end, while the pectoral fins of male fish are longer and pointed at the tail end. There are also dots on the pectoral fins during the breeding season. The cloaca of female fish is round and slightly larger, pear-shaped, with the handle facing forward, close to the pectoral fin, and slightly convex outward; the prismatic opening of male fish is slightly smaller, like a date pit, with sharp ends, bulging in the middle, flat and slightly concave.

3. Another way to judge the breeding season is that female fish swim slower and react more slowly, while male fish swim more actively and chase more sensitively. Finally, observe the abdomen of the fish. The abdomen of female fish is soft, with no hard edges from the abdomen to the anus, and the abdomen swells and becomes round during the breeding season; the abdomen of male fish is harder, with obvious hard edges from the abdomen to the anus, and does not swell during the breeding season.

Additional information

Male and female goldfish can be distinguished mainly from the following aspects:

Differences in external appearance

Differences in body shape: Male goldfish are generally slightly longer, while female goldfish are shorter and rounder. During the egg-carrying period, the abdomen of female goldfish is more swollen than that of male goldfish.

Difference in caudal peduncle: The male fish is slightly thicker than the female fish and the body is slightly longer.

Difference in pectoral fins: Careful observation reveals that the pectoral fins of male fish are slightly pointed and long, and the first pectoral fin spine is thicker and harder; the pectoral fins of female fish are short and round, and the first pectoral fin spine is not very hard.

The difference in genitals: Looking upward from the belly, the male fish's genitals are small, narrow, and concave; the female fish's genitals are large, slightly round, and convex outward.

The difference in color

The body color of male and female goldfish is slightly different. Male fish are generally brightly colored, while female fish are slightly lighter. During the reproductive and development period, the body color of male fish is brighter.

Although goldfish is an omnivorous fish that has been completely domesticated by humans, like other fish such as crucian carp, whether the feed is selected reasonably and fed correctly can directly affect the growth and development of goldfish, the depth and brightness of color, the manifestation of characteristics, whether it is plump, as well as the number of eggs laid, the hatching rate and the disease resistance of goldfish.

Therefore, the feed for goldfish must contain nutritious protein, fat, carbohydrates, various vitamins, a certain amount of inorganic salts and trace elements, etc. For example, under the same other conditions, those who can feed enough fresh and live bloodworms every day will grow very big, especially the lion head and blisters (referring to tumors and blisters) are more developed. This may be because bloodworms contain a lot of animal protein, fat, carbohydrates and other rich nutrients.

It is better to feed them with 0.5% salt water. There is chlorine in tap water, so you should expose them to the air for half a day to remove the chlorine, or rinse them with commercially available neutralizing liquid or vitamin C candy four to five times to neutralize the toxicity. Well water contains more harmful substances, so you should also pay attention to it.

In addition, there is a breeding method called "green water" among goldfish breeders, which controls the amount of phytoplankton and algae in the water tank to keep the water in a slightly transparent green tea color. By eating phytoplankton in the water, the body color of goldfish can be made more colorful, and it can also ease the drastic change of water quality when changing water. However, if it is not properly managed, the excessive reproduction of phytoplankton will make the green water color too dark, which is easy to cause diseases in goldfish.

Reference source: Baidu Encyclopedia: Goldfish