Goldfish breeding is not an easy process. It is difficult to breed goldfish in captivity and is not easy as it is in outdoor ponds because it is their natural habitat and there, goldfish have more oxygen, space and plants to lay their eggs on. So, to induce breeding they need quality care just like their natural habitat, including more space, right nutrition and quality water conditions with specific temperature. All this helps in finding fertile mates, encourages procreation and ensures correct incubation and birth of eggs in breeding goldfish.
To breed goldfish you need plants, sponge filter and an air pump for the fry tank and spawning mop and also male and female goldfish. Your main aquarium tank should be established and properly cycled with filtration, plants, spawning mop and heater. Spawning mop protect the eggs from the parents. Also, set up a small tank for the fry.
Sexing and Isolating
Goldfish can be sexed from the age of one year. You should know the number of males and females before you can start breeding goldfish.
- The Female has swollen abdomen,which is very soft and movable and are rounded than the males and when she is ready to spawn, vent becomes protruded. The Pectoral fins are round and short.
- Male has breeding tubercles or white “stars” covering its gills and pectoral fins and when he is ready to spawn, the vent becomes more open and longer. The pectoral fins are pointier and longer.
Isolating males and females for a week in different tanks before breeding to create a greater desire to breed.
The breeding process is started by the female when she sends out pheromones which encourages male goldfish to produce milt. Goldfish gets interested in spawning with gradually increasing temperature of the water, which ensures good spawning. Male grows tubercles on his gills and fins and starts to chase the female around the aquarium to encourage her to release eggs.
Time of Spawning
Spawning process can be of few days, a week or more than once a season. Goldfish breed better at the age of 3 years and spawn from April to August and the spawning activities occur daily until all the females have laid eggs when the weather is warmer.
Goldfish eat all their eggs. Hence, separate parents from their eggs to ensure eggs are hatched successfully. Fertilized eggs should hatch within 4 to 7 days. When eggs are fertilized, feed them the same food that you feed the adults. Make sure they are in smaller bites than the adult food. Soon your young goldfish will develop.
Feeding New Fry
Newly hatched fry are small and must be given very nutritious and very small food. Start feeding them at 48 hours after hatching and feed them newly hatched brine shrimp. This is high protein formed for the hatchlings of egg layers.
Once fry start swimming, they’re still too small for fish foods, you should feed them egg yolk dissolved in water. To feed egg yolk dissolved in water you must hard boil an egg and break off into pieces of the size of a pea. Put the piece of yolk in a sealed jar of water from the fry tank.
The Jar must be shaken until egg mixes and water looks cloudy. Now you must pour small amounts into the tank at a time and store the rest in the fridge for future feeding sessions. You should make new batch once every few days so that it will ensure you that you are always using reasonably fresh egg.
As the fry grows, you can start to feed them with larger foods like daphnia and powdered spirulina flakes. Gradually they will become large to eat premium flakes and pellets. With all proper care and feeding, the fry will reach full maturity at around age of two years in most cases and will become old enough to start the process of goldfish reproduction.
Finally, do not add any fry to the main tank till they are big enough to survive with the other goldfish which means they should be strong swimmers and should be bigger than the mouths of the adult goldfish. Know More