Goldfish Eggs

At the time of mating, male releases sperm and female releases unfertilized eggs. Sperm and unfertilized eggs get together to form fertilized eggs on the leaves. Female may lay eggs from 10 to 1000 eggs.

Ideally, you should remove the eggs from the main tank and transfer them into a dish no more than six inches deep so that you can wash the eggs. Otherwise, we can separate parents to another aquarium to prevent them from eating the eggs. If eggs are scattered, we can remove those from the mating tank by using a siphon. Just make sure that the temperature of this water is the same as the temperature of the water in the tank.

After cleaning the goldfish eggs, place them in a 20-gallon tank. Maintain a steady temperature of 70 degrees Fahrenheit.

Egg Fungus

Some eggs will be white in color while others tanned. The clear, white ones are the fertile eggs. You should remove the infertile eggs as they are susceptible to fungal infections that could kill the fertile eggs as well. We can remove infertile eggs using finger nail tweezers. The fertile eggs will hatch in four to five days time. To prevent egg fungus, add dilute solution of methylene blue to the water tank which has the transferred eggs. We can keep all the eggs first in methylene blue solution for one day. Then remove the unfertile eggs and transfer the fertile eggs to a fresh water tank. Frying does not do well in methyelene blue solution.

Now, let's see stage by stage how an egg becomes a fry or hatchling. It is a well developed embryo.


Goldfish requires more oxygen in the development stage. Use of mud and organic debris is not suitable to the development of eggs. At birth, Goldfish are tiny… only one sixth of an inch! They are translucent and have large black eyes.

Fry care

After the hatchling comes out, we have to care until it attains full growth. First, move the hatchings into larger tanks of 20 gallon or divide them to prevent overcrowding.


Your fry likes warmer temperatures, so maintain the temperature at 75 degrees F.


Unwanted organisms can be grown in the tank. In order to prevent from growing such organisms, add 2 spoons of salt per 10 to 12 gallon water. Don't add too much of salt since Goldfish does not like salty water.

Tank cover

Please cover the water tanks with glass to keep moisture in. You should provide more oxygen supply to the fry.

Filtration and Aeration:

To provide bacteria in the tank, use filter with carbon and floss. Fix filter in the corner of the tank. Otherwise, you can also make use of sponge filter. Light aeration is needed for the egg until it starts to feed. We can provide light aeration in the filter by flow of air bubbles. Don't feed fry until it can swim.

Lighting and cleaning

If you start feeding them, you have to clean the tank on a regular basis. Before feeding, make sure the tank is clean. Provide light above the tank after you add food in the tank. This will be very helpful for the fry to find their food.

Goldfish Care Tips

Goldfish Breeding
Types of Goldfish
Goldfish Bowls
Do Goldfish Sleep
Goldfish Eggs
Goldfish Diseases
Goldfish Feeding
Feeder Goldfish
Goldfish Memory Span
Goldfish Life Span

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