First, about the difference between men and women:

1, males are generally larger than females, and their bodies are wider, while females are smaller and narrower!

2. The head of male fish is generally bigger than that of female fish, and the probability of female fish laying hands on him is very low.

3. There are obvious black spots on the dorsal fin of female fish.

4. The genitals of male fish are V-shaped, while those of female fish are U-shaped.

Second, the choice of adult parent fish:

1, male fish:

A: The sexual maturity of male fish is later than that of female fish, and it usually takes more than 8 months to reproduce. Therefore, it is necessary to choose healthy male fish with large size and strong body, so as to ensure the survival rate of small fish.

B: Because the gene of Lohan is unstable, in order to breed small fish with good quality, we should first choose the male fish with the best appearance, so that there will be more small fish with good quality.

2. Female fish:

A: Female fish mature early. Generally, females over 4 months old can basically lay eggs, so females are relatively small. Therefore, we should pay attention to strengthen the nutrition of the mother fish when feeding at ordinary times, so that the bigger she grows, the better.

B: Choose female fish with good body color and consistent ink spots, so that the quality of small fish can be guaranteed.

3. Match:

Before pairing, put the parent fish together and observe whether there is a fight. If there is no fight, it proves that the pairing has been successful. If there is a fight, the parent fish should be separated immediately, indicating that the pairing is unsuccessful.