How do goldfish divide male and female??? How to divide male and female goldfish

The first (most simple and clear) star-chasing male's first fin has milky white star-chasing females have none Second, body type The males are thin and long, the females have a short and thick body, and the hind abdomen is large, and the breeding period is more obvious The third cloaca The males are small and long, with pointed ends and concave inwards, and the females are large and round, pear-shaped, and slightly convex outwards.

This depends on the variety.

Goldfish are divided into male and female: goldfish can be distinguished by different body types, generally male goldfish body size will be more slender, while female goldfish body size is generally short and round.

We can also start with the size of the goldfish, the adult male goldfish are slender like willow leaves, and the body size of the goldfish is often short and fat. Comparing a tank of goldfish together, you can quickly see that the male and female of the goldfish are coming according to their body size, which is an important basis.

Goldfish is one of the world's three famous ornamental fish, originated in China, has a history of more than 1700 years, goldfish in China's ornamental fish exports occupy a very important position. Goldfish has a beautiful body and a wide variety of species, its body color is red, yellow, blue, purple, black, white, two-color, three-color, five-flower, etc., its body shape has lion head, high head, blister, dragon eye, pom-pom, pearl scales, butterfly tail, tiger head and so on.

The five representative varieties of goldfish are grass gold, red dragon eye, crane top red, blister, and black longevity.

Morphological characteristics:

Goldfish belong to the same species as crucian carp taxonomically, and compared with crucian carp, goldfish have huge variation in external morphology, but in general, the whole fish body can be divided into three parts: head, trunk, and tail. The anterior end of the head is the mouth, and the posterior part has the nose, eyes, and gill cover.

Male goldfish that enter the breeding period will appear white star chasing on the gill edge and pectoral fin, which is the most accurate moment to identify the sex of the goldfish.

The above content reference: Encyclopedia - Goldfish.

To distinguish between a female goldfish and a male goldfish, you can use the excretion port, body size, tail and swimming speed. Male goldfish have a long excretion and a slender body, a wider, flattened tail, and shorter fins that swim fast. The female goldfish has a large excretion mouth and body size, and the fins are curved and thick, and the swimming speed is slow.

Usually, the most direct way to distinguish between male and female goldfish is to observe the excretory outlet of goldfish. Typically, male goldfish have a longer vent, while females have a larger vent that is round for ovulation.

If you put the female goldfish and the male goldfish together, the female goldfish is usually fatter, while the male goldfish is more slender. And the number can be distinguished by the tail of the fish, and the tail of the male goldfish is a little wider and flatter than that of the female goldfish.

To distinguish the male and female goldfish, you can also observe from the fins of the goldfish, generally the curved and thick goldfish are female goldfish, and the short fins are male goldfish. Male goldfish swim faster, while female goldfish swim significantly slower.

Male and female goldfish are mainly distinguished from the following aspects:

a) Differences in external morphology:

1) Difference in body shape: Male goldfish are generally slightly longer, while female goldfish have a shorter and round body. During the egg-bearing stage, females have larger abdomen than males.

2) Difference in caudal peduncle: males are slightly thicker than females.

3) Differences in pectoral fins: careful observation shows that males are slightly pointed and long, and the first pectoral fin spines are thicker and harder; Females are short and round, and the first fin spines of the pectoral fin are not too hard.

4) The difference between the cloacal pores: from the belly upwards, the cloacal pores of male fish are small, narrow and concave; The cloaca of females is large, slightly rounded, and convex outward.

2) The difference in color: the male and female goldfish are slightly different in body color, the male fish is generally brightly colored, while the female fish is slightly lighter, and the male fish is more vivid in the reproductive development period.

3) Feel and movement: Gently support the belly of the fish with your hands, and feel a clear hard line on the abdomen of the male and female with the middle finger and ring finger, while the female has a softer abdomen. When walking past the edge of the pond, stomp on the ground and observe, the male swims fast and agile, while the female moves slower.

4) Star chasing: As the temperature rises, goldfish will have a second characteristic during the spawning period - star chasing, which is the easiest and most accurate time to identify the sex of goldfish, and it is also the easiest way to grasp a method of identification. The star-chasing of male fish appears on the first spine of the pectoral fin and the edge of the gill cover, and often there is a star-chasing on each fin bar of the entire pectoral fin, the front end is obvious, and the back one must be carefully observed.

This kind of rough little white dot is star chasing.

Using the above identification methods, it is also necessary to rely on many years of breeding experience and careful observation to accurately distinguish the male and female of goldfish.

To put it simply, there are dots on the fins on both sides of the male's body length, and the female's body is short and round, OK