The red top koi can breed. Danding koi spawn once a year. From April to June every year, when the water temperature is around 18°C, Danding koi can reproduce naturally. Sexually mature male fish will continue to chase female fish to promote female fish spawning.

Put the egg attachments, and the female will grow in the early morning or Eggs are laid in the morning, about 200,000 to 400,000 eggs are laid each time. Take out the attachments of the fish eggs and put them into the prepared tank or pond for hatching. When the water temperature is 20 ℃, the fry will naturally emerge in four days.