How to distinguish male and female guppies

For those who are keen on fish farming, guppies are a good choice for beginners. It is a tropical ornamental fish with rich colors and various shapes. It is also worth mentioning that it has strong reproductive capacity and has the title of "million fish". Therefore, for breeding guppies, if you want it to grow big and beautiful and give birth to better-looking offspring, it is very important to raise male and female fish separately. The female fish will eat its own eggs. Let's talk about how to distinguish male and female guppies.

1. Identification of juvenile fish

It is definitely impossible to tell the difference between newborn fish. If they grow normally, you can tell the gender in about a month. If you still can’t tell the gender after more than a month, it may be because of the slow growth of the fish due to food or water quality.

1. Under normal circumstances, the male fish will start to change color first. You can identify the male fish by looking at which fish change color first.

2. You can look at the back part of the belly. The color inside the belly of the female fish can be seen, while the color inside the male fish is covered with a white belly and you cannot see it.

Identification of two adult fish

The sex of adult fish is easy to identify, almost at a glance

1. Look at the color. The female fish is not as brightly colored as the male fish. The male fish has large fins, beautiful features, and patterns on its body. The female fish has very short fins and a very plain body color without any gorgeous patterns.

2. Look at the tail. The male fish's tail is larger in proportion to the female fish's. An adult male fish is about 3 cm long, with a short body. The length of the tail accounts for about 2/3 of the total body length, or even larger. An adult female fish can reach 5-6 cm in length, with a long body and a short caudal fin. The length of the tail accounts for more than 1/2 of the body length, and the tail is usually black.

3. Look at the anal fin. The anal fin of the male fish is very narrow, while that of the female fish is wider and fan-shaped. The male fish's anal fin is thin and long, with a small groove at the tip of the fin, while the female fish's pelvic fin is wide, large and short. The male fish is characterized by a small, elongated abdomen.

The key is that its anal fin has evolved into a copulator, which is used to transport the mirror during reproduction. Therefore, the fin rays in front of the male fish's anal fin are relatively thick, while those in the female fish's anal fin are evenly distributed.

4. Look at the fetal spots. The body of the female fish is relatively transparent. If there are black spots at its anus, it means that it is pregnant (some species have red fetal spots). The larger the fetal spots, the closer it is to giving birth.