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Carassius auratus
Fancy Goldfish, Kingyo, Moor

 Age of Aquariums > Freshwater Fish > Fancy Goldfish - Carassius auratus

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Photo Credit: Amy Tran

Start Your Own Goldfish Family

Well, I think the fancy goldfish breeders deserved their credit by introducing new varieties. They make the art of goldfish husbandry more exciting and challenging with more exotic features and colors to chose from. Breeding goldfish is not at all hard, you just need to apply a few basic steps correctly and shower them with some attention and affection.

1. Sexing Your Goldfish
a) Male - normally has tubercules (white pimple like spots) on their opercula and pectoral fins.
b) Female - have a more rounded body (full with eggs/ova) during the breeding season.

2. Conditioning Before Spawning
a) Separate the male and female fish for at least a week, either by placing them in different tanks or seperate them with a glass in the same tank.
b) Choose only the best and healthiest fish. The 'chosen ones' must be at least 18 months old.
c) Feed them heavily with blood worms, garden worms or other nutritious foods.

3. Spawning
a) Goldfish can be spawn naturally or artificially.
b) Place the 'chosen ones' together. Normally the male fish will start the courtship by chasing the female fish around the tank.
c) The suggested ratio of male:female is 2:1 (maximizes the fertilization process).
d) If you intend to move the eggs to another tank, you are advised to put some water plants (elodea, hornwort) or plastic plants/mob in the tank (so that you can move them later).
e) After the female lays her eggs all over the tank/plants, the male will follow closely to fertilize the eggs.
f) Be alert because the 'chosen ones' will start to devour their eggs immediately after they are laid.
g) Move the plants filled with eggs to a well aerated tank. The tank water must be the same temperature and pH as the breeding tank.

4. Congratulations Daddy & Mummy
a) The fertilized eggs will be amber or transparent in color, while the unfertilized ones are white.
b) Prepare an airstone with mild aeration near the eggs.
c) Some aquarists like to add a few drop of methylene blue to the water (anti-bacterial/fungus chemical).
d) If everything goes well, in 3-4 days (27C) tiny baby fish the size of a pinhead will attach themselves to the aquarium glass or plants. The duration for hatching co-relates to the temperature, the higher the temperature, the faster they hatch.

5. Grow, Baby Grow
a) Feed the fry with brine shrimp (hatch the brine shrimp by adding 2 teaspoons of salt + 125 ml of aquarium water + 2 teaspoons of brine shrimp eggs, aerate the mixture 2 days after the fry are hatched).
b) The brine shrimp will hatch in a day.
c) Suck out the brine shrimp and feed them to the fry 2-3 times a day.
d) Alternative fry foods are ground fish pellets or egg yolk seived through a canvas handkerchief.
e) Control the quantity of food (be sure that the fry eat up the food in 5 minutes) and serve as frequent as possible.
f) Please do not overfeed or underfeed.
g) Change about 10% of the tank water after 1 month. Make sure the water is dechlorinated or aged.


Contributed by Golden Zero

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