There are many kinds of fish, and different kinds of fish have different ways to distinguish between male and female. But there is a method that is basically universal, that is to observe the abdomen after the breeding period, generally speaking, the abdomen is swollen female. In addition, the females of most fish are larger than the males, and during the reproductive season, the males tend to appear multi-colored, or have pearl stars on the body or pectoral fins.
1, guppy: guppy is a common tropical ornamental fish, this fish in childhood is not easy to judge male and female, usually the first color is male, in addition, if you look at the stomach, the female fish can see the color, the male is white. When it comes to adult fish, there are many ways to distinguish. First, you can see the anal fin, which is narrow in males and fan-shaped in females. Secondly, you can look for fetal spots, some of which are female fish. In addition, the tail of the male fish will account for a larger proportion, and the overall color will be more bright.
2, goldfish: goldfish are cold water fish, a wide variety of identification methods are not fixed. First of all, you can see the body shape, usually the male is relatively slender, the female is fat and short. And the male fish's tail is more robust, looks broad and flat. When swimming, the male is more agile and faster, and the female is slower.
3. Traffic light: It is difficult to identify the sex of the traffic light fish. Usually, the male and female are relatively slender, while the female is a little stout. But this way is not very accurate, only to the breeding period, the observation of abdominal conditions can be distinguished.
