Interestingly, the age of the female Koi has a lot to do with how hard theuk business email database shells of her eggs will be. Thin-shelled eggs may not live, while eggs from a female older than five will have such hard shells that the sperm from the male is not able to penetrate them. Time is of the Essence Once you have picked out the fish you want to breed, it is best if you do not rush into breeding right away. Take some time to feed up and condition your fish so as to assure yourself of good results.
Set up a tank or a pond for spawning, and then place one male and two females in this area when they are ready for best spawning results. Signs of Spawning The white, raised spots on the pectoral fins and on the head can help you spot males who are ready to spawn. These are called breeding tuberdes, and if you were to touch them, you would find that they feel rather rough, something like a day old growth of facial hair. The breeding tuberdes are used by the mail to try to encourage the female to spawn.