breeding pair siamese fighting fishBefore the fish may reproduce, they has to be in good health; both the male and female must be accurately fed for a period of time just before breeding. The male will sometimes build his nest in response to a rise in temperature. You can try to put a female in with the male once he has accomplished his nest. Keep an eye on them!It’s fairly rare for one of them to attack the other and attempt to kill him. The male isn’t always the person who tries to murder the feminine. A nest breeder, the combating fish is.