It's usually July. Swordfish is an ovoviviparous fish. Strong reproductive ability, early sexual maturity, 3-4 months of sexual maturity of young fish, 6-7 months of maturity can breed offspring. Let's talk about the fishing and breeding methods of red flag fish first.

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1: You can breed offspring at maturity, which is closely related to water temperature and feeding conditions in the morning and evening. Female swordfish are born every 4-6 weeks, which is affected by the age of female fish and the proportion of male fish. When you can produce 30-300 larvae at a time, you should pay attention to the fact that the number of fish in the same nest should not exceed that of the second generation, so as to avoid species degradation caused by continuous inbreeding, which will make the fish body of the offspring smaller and smaller, and the dorsal fin shorter and narrower. It is best to introduce the same species of fish for purposeful distant hybridization to prevent subspecies from degenerating and achieve the purpose of improving species. But the life span of red-flag fish is very short, generally only 2-3 years.

2. Red-flag fish is highly sensitive to water quality. Newly-purchased red-flag fish from outside the home (especially newly-purchased red-flag fish from other places) need to be watered at least 20 times. If the red-flag fish kept in your own aquarium is replaced with water from other aquariums, it needs to be watered at least 10 times. Moreover, the newly acquired red-flag fish must pass through the water, because the newly acquired red-flag fish can't adapt to the water in the aquarium where you cultivate ornamental fish, so the newly acquired red-flag fish's physique will drop, and its natural disease resistance will also drop, especially if the newly acquired red-flag fish has just fallen ill, it will be thrown into the water in the aquarium where you cultivate ornamental fish, and such newly acquired red-flag fish is easy to relapse.

3. Red flag fish must not be mixed with other kinds of ornamental fish. Although the red flag fish is not docile and easy to bite each other, it must not be mixed with other kinds of ornamental fish! Because the body color of swordfish is red, even docile ornamental fish of other species will eat it as food when they see it. Other fish died, and the loss outweighed the gain.