How many eggs can koi fish lay at a time and how long do fish eggs hatch

Koi can lay 200,000-300,000 eggs at a time. The breeding time of koi fish is in May, and the mature time of females is one year later than that of males. Under normal circumstances, koi fish grow very fast. When they are still seedlings, their body length can increase by 10-20 cm every year. When they become adults, their growth rate will start to become slow. In addition, koi fish eggs usually take 5-7 days to hatch.

1. How many eggs can koi fish lay at one time

The number of eggs laid by koi fish is still very large, and generally koi fish can lay 300,000 eggs at one time. Koi is an egg-laying animal, so pay attention to the temperature of water when laying eggs. If the water temperature is too low, it will directly affect their spawning. Usually, the water temperature they adapt to is above 20 degrees. When koi fish lay eggs, it is best to put them in a separate fish tank, because once they lay eggs, if there is no artificial protection of eggs, small koi fish can easily become food for other fish or even big koi fish. Although koi has strong adaptability, they have no awareness of protecting the next generation, so they may eat their own offspring. Therefore, after spawning, we should also pay attention to isolating parent fish and fish eggs, so as to avoid parent fish eating fish eggs by mistake.

2. How long does koi fish eggs hatch

It usually takes 5-7 days for koi fish eggs to hatch. When 5 to 7 days have passed, the small koi will hatch. Don't feed the newly hatched koi for the time being, just put them in water. When the small koi grows to about 5 cm, it can be fed some foods with high nutrition to help them grow quickly.

The small koi carp in the growing period has a great demand for nutrition, so it is best to mix and feed a variety of foods to ensure their nutritional needs in all aspects. When their gonads mature, they can lay eggs and reproduce the next generation.