Breeding Goldfish and Koi isn’t just for the big boys
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Breeding goldfish and Koi isn’t easy. Whether or not you have the desire to raise goldfish or not, if you have a mixed gender tank or pond, they are going to breed. When goldfish are breeding they put on quite a show; this is what we call spawning. The males chase the females for hours, shoving them around and rubbing against them; creating quite a splash. This behavior is normal, although it often looks abusive, and since the female’s eggs often do not release on their own, it’s quite necessary. Many male goldfish have been isolated because spawning was mistaken for aggressive behavior
Something Smell Fishy?
Spawning is encouraged after the rise of the water temperature which most commonly takes place in spring, with water temperatures climbing to 65 degrees Fahrenheit and above. A rise in temperature of three or four degrees must occur. When the temperatures do rise, the females develop eggs. When the eggs are fully developed, she emits a hormone that attracts the males, and the chase begins
Once the female tires; she may appear as though she’s in distress; gasping; drifting aimlessly, but will soon make a full recovery. The chase will continue until the female releases the eggs. The male will fertilize them as they are being expelled as the grand finale
Breeding goldfish and Koi
Goldfish and Koi Spawning
After the eggs are released they float delicately in the current, and eventually adhere to plants and decorations in the tank or pond. If they are not removed, will soon become a welcome and nutritious treat for the goldfish. Any eggs that are fortunate enough to hatch, will produce fry (baby) goldfish. These fry are also at risk if not removed from the larger fish
Breeding goldfish and Koi
Quite often you will see one or two goldfish in tank, although, this is a recipe for disaster if these fish are female. Maturing at 3 to 4 years of age, female goldfish produce eggs with or without the availability of males. Young healthy females may release the eggs with or without a male, but sadly many females will become impacted. In most cases, the eggs will be reabsorbed ito the body, although, if more eggs aren’t being produced in the meantime, binding her up even more. This may lead to floating disorders, extended or swollen abdomen and even worse; infection. In a small body of water like an aquarium, the temperature fluctuations may be often
If you smell fresh fish, this indicates the are spawning or have recently spawned. The smell will vanish soon after the fact. Could we be smelling caviar?
Only mature females produce eggs and only mature males are capable of fertilizing them, although, young goldfish ‘play’ spawn even though they are not old enough for breeding; this is a natural instinct. Some females slow or stop emitting hormone as early as 7 or 8 years of age, however most go through menopause at 10 to 12 years
What is spawning?
The age of spawning may depend on the general health of the fish and the environment, however, complications set in after menopause. Reduction of hormone leads to impacted eggs which lead to floating issues. Unfortunately, a lot of female goldfish will die prematurely due to female issues
If you look at the photo below closely, you’ll see the eye of the unborn fry in the egg