The breeding cycle of tropical fish is related to its size. Usually, small tropical fish only need 28-50 days to breed a litter, but larger tropical fish often need 3-4 months to breed once. Usually, small fish have strong reproductive ability and their life span is not long. If they are raised artificially, it is best to provide a good reproductive condition so that they can be raised all the time. However, large fish have a longer life span and are usually not raised too much, so it is difficult to reproduce.

1. Male and female matching: Female and male fish must be selected for tropical fish reproduction. Under normal circumstances, after sexual maturity, the female fish has an enlarged abdomen and the male fish is flat. According to the different situations of fish, it is necessary to put male and female in a certain proportion, which can improve the success rate of pairing.

2. Pairing into the tank: After tropical fish are successfully paired, they often swim and eat together. At this time, the paired fish can be put into a special breeding tank, and it is best to use the water changed from the original tank in the tank, so that the fish will not feel uncomfortable due to the change of water quality.

3. Wait until spawning: Feed regularly at ordinary times, but don't change water frequently, so as not to stimulate female fish. When the fetal spot on the abdomen of the female fish is obvious and begins to hide around, it means that it is about to lay eggs. At this time, it is best to provide some aquatic plants so that the eggs can adhere. After spawning, it is best to fish out the parent fish to prevent them from swallowing the eggs.