How do tropical fish look at male and female, and how do fish distinguish male and female

It's actually very simple: the brightly colored ones are the males, and the ones who don't look good are the females

Depending on the size, it can be a large male or a small male, or a male or a female.

How to distinguish between male and female map fish.

One is to look at the color of the fish, most of the males have colorful bodies, and the other is that during pregnancy, the female's belly is large and garden

Depending on what kind of fish it is, different types of fish have different identification methods.

It depends on the variety, not necessarily.

The female fish with a large belly and the male fish with a small belly.

There are many theories about the origin of monk fish, but in general, it is in Malaysia and Thailand.

Even Taiwan has the predecessor of the monk fish. How to distinguish the male and female of a monk fish?

For the question of how to divide male and female monks, the following five points are generally used to distinguish them:

1.Thorny dorsal fin: The first to sixth spinous dorsal fins are thicker and rounder and are males, and if they are thinner and flattened, they are females.

2.Pelvic fin: touch the pelvic fin with your hands, the harder is the male, the softer is the female, because the female must use the pelvic fin to shake to provide oxygen to the eggs when breeding, to prevent the invasion of bacteria, and can be used to sweep away debris.

3.The sharper fish chest is more female, and the fish breast is more rounded and more male.

4.Body shape: Usually the thicker body of the fish is the male.

5.Genital pore: The genital pore protrudes in a V-shaped shape for males, and the genital pore protrudes in a U-shaped shape for females.

It is a hybrid species, and the method of distinguishing the black spots on the dorsal fin is not accurate. However, the general method of distinguishing males and females cannot be used on the little arhats, so the original parental discrimination method is used to increase the probability of distinguishing the males and females of the little arhats.

Generally, the little male arhat is more courageous, and the little female arhat is easy to be frightened and blackened. In the case of underfeeding, the hand is waved gently and does not dodge, mostly males, and the black that continues to hide under the feet is usually female. When full of food, generally the small mutation is like a person approaching, most of the little female arhats will run around, and the little male arhats will shrink to the side corners.

Most of the fish are dioecious, and some fish are hermaphroditic, such as the yellow eel is a hermaphroditic fish.

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.