Koi fish lay eggs from April to June. During this period, the temperature is suitable, which is the most suitable time for them to lay eggs. However, they cannot lay eggs until they are sexually mature. Females usually begin to lay eggs around the age of three. When they begin to spawn, they should ensure that the water temperature is appropriate, the pH value is appropriate, and the fish tank is clean and tidy. It's better for them to ovulate. Koi can lay 200,000 to 300,000 eggs every year. Although the number of eggs laid each time is large, the hatching rate is relatively low.
Generally speaking, female koi can reach sexual maturity in about three years, and male koi can reach sexual maturity in about two years. When they reach sexual maturity, they will come into estrus and lay eggs in April-June every year. However, in order for them to lay eggs, it is best to ensure that the water temperature is around 20 ° C. This temperature is the most suitable temperature for them to lay eggs. At this temperature, the hatching rate of fish eggs is higher. Of course, they can also lay eggs in water around 18 ° C. When they lay eggs, they should also be careful not to disturb them. At this time, they are particularly vigilant. A little noise will frighten them, thus prolonging the laying time. II. & nbsp; How many eggs
can koi lay? Koi is a kind of fish with a relatively high number of eggs. They usually lay eggs once a year, and can lay 200,000-300,000 eggs each time. Even though so many eggs are laid each time, the adult rate is not high. Because these eggs are fragile, they may be swallowed by the parent fish, or they may fail to hatch due to changes in water temperature. Therefore, after the female fish lays eggs, the eggs need to be taken out in time and hatched at a suitable temperature.
There are also koi that spawn 2-3 times a year, because some koi do not release their eggs at one time, so they can spawn many times a year. But the number of eggs they eventually lay is almost unchanged, which is also between 200000 and 300000.
