MySheen

How big do koi lay eggs? How long does it take to hatch the small fish?

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, Koi, a kind of high-grade ornamental fish popular in the world today, has the laudatory name of living gemstones in the water and works of art that can swim. So how old can koi lay eggs? How long does it take to hatch the small fish? According to Boss Wu, a big farmer, koi is an egg-laying animal and a male.

Koi, a kind of high-grade ornamental fish popular in the world today, has the laudatory name of "living jewel in water" and "art that can swim". So how old can koi lay eggs? How long does it take to hatch the small fish? According to Boss Wu, a big farmer, koi is an egg laying animal. The male koi matures at 2 years old and the female koi matures at 3 years old. After the gonads mature, they can begin to lay eggs and reproduce. After that, the gonads periodically mature once a year and can reproduce once.

How long does it take to hatch the small fish?

After the koi spawn, transfer the fish or eggs out immediately, otherwise they may be eaten. Leave the eggs in the water, and they can hatch in seven days. After coming out, the small fish are fed with "migratory water" (that is, bait for small aquatic animals such as paramecium), and can be fed when they are 5 centimeters old.

How to distinguish between male and female in koi

Mature koi can be identified by the following three ways.

Look at the figure: those with enlarged abdomen are female; the skinny elders are male.

Look at the anus: the wide and flat anus is female; the anus is small and invaginated is male.

Look at the chasing star: when the male is about to excrete sperm, a small reproductive tumor will grow on the head and pectoral fin, namely chasing the star. In the breeding season, those who do not chase stars are females; those who pursue stars are males. Touch the fin with your hand, such as a rough horny protuberance is a male, and a smooth one is a female. Mature male fish gently press on the abdomen and white semen will flow out.

 
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