There are many signs before tropical fish give birth to small fish, such as the anus will bulge, the hip fin will always shrink, and the tail will rise. Near the time of delivery, the belly will become larger and larger, and the fetal spots will become more obvious. Usually, when breeding, it should be put into the breeding tank. After the eggs are produced, the parent fish should be fished out to avoid swallowing the eggs. The eggs hatch in a few days and can be fed with water at the initial stage. 1、 What are the signs? Before a tropical fish gives birth to a small fish, its anus will bulge, at the same time, its hip fin is always in a contracted state, and it will raise its tail. It usually takes a month from fertilization to delivery, and as the delivery period approaches, the belly of the fish will become larger and larger, and the fetal spots will become more and more obvious. If you lower the water temperature or push the belly of the fish, it can have the effect of inducing labor. 2、 Breeding method 1. Prepare breeding tank: for tropical fish breeding, prepare breeding tank to separate it from other fish to prevent attack. Water should be kept in the tank before the parent fish can be put into it. If the parent fish have been paired, the paired fish can be put in. If they have not been paired, they can be put in according to a certain proportion of male and female.
2. Regulating water temperature: tropical fish have certain requirements for water temperature, which should be maintained at about 25 ℃. It can be heated appropriately during breeding period, but not more than 30 ℃. In addition, pay attention to the water quality. Some fish tank stones can be placed in the tank, which can settle and discharge the waste generated, so as to avoid the deterioration of the water body. Aquatic plants can also be planted to provide a certain amount of oxygen for energy consumption.
3. Mating and spawning: when the fish enter the breeding period, they will mate and spawn soon, usually in the evening or late at night. Due to the numerous species and different habits of tropical fish, some need to be fished out in time after spawning to prevent them from swallowing fish eggs, while others have the function of protecting eggs.
4. Larval fish culture: usually, fish eggs do not need to hatch in one day. After hatching, they do not need to be fed immediately. At the initial stage, they can digest the yolk sac and generally feed it every other day. For larvae, pay attention to the size of the food. Small fish need to be fed with migratory water, and larger fish can be fed with fish and insects. （ReDaiYuShengXiaoYuQianDeZhengZhao，ReDaiYuFanShiFangFa）