Goldfish are, there is no a doubt, one of the most popular species of aquarium fish.

You are watching: What do baby gold fish look like


Whether you room looking to breed your goldfish or merely wondering what those small spheres are in your tank, us will discuss the basics in this article.


Goldfish BiologyBreeding Tank SetupFrequently inquiry Questions

Goldfish Biology

The first thing come know: over there is no such thing as a pregnant goldfish.

These fish carry out not bring live young in ~ them till gestation, and they do not give birth to live fish. Goldfish are an egg-laying species.


Female goldfish tend to it is in rounder, also when not carrying eggs. Once carrying eggs, they might look slightly more rounded on one side or the other.

Rounded female goldfish transporting eggs (source)

Look simply behind the anal fin for the anal vent. A female’s vent will protrude slightly, especially when she is ready to breed. Her pectoral fins will certainly be much shorter and an ext rounded.

Males will be slimmer, particularly when viewed from above, and also have longer, spicy pectoral fins.

If you doubt your goldfish are ready to breed, check the head, gill covers, and also pectoral fin of her male fish for the existence of spawning tubercles. These will appear as small, white bumps.

How to Tell if her Goldfish is delivering Eggs

If you notice that your goldfish is a little rounder and plumper, it can be that your woman is carrying eggs.

Goldfish full of eggs (source)

First, try to rule out other reasons for the readjust in her goldfish’s shape. Be aware that they have the right to swell indigenous illness, such as dropsy, or native being overfed.

Mating Indications

On height of the raised size of your female goldfish and the visibility of white tubercles on your male, one more sign that goldfish reproduction is behavioral.

If the woman is moving eggs and ready to spawn, she release a pheromone right into the water. The male will certainly then begin to chase her and bump her abdomen or sides to encourage her to relax eggs.

Eye and also spine advance in fertilized eggs

Once the fried food hatch, execute not it is in alarmed if you check out them stationary close to the tank’s bottom or sides. The takes a few days for them to become free-swimming.

At first, they will not look lot like goldfish, yet over the comes weeks, they will certainly develop and also grow.

Baby Goldfish Care and Feeding

For the very first two to 3 days, the fried food will usage their egg sacs together a food source. After that time, feed them commercial fry food, infant brine shrimp, or daphnia.Start the end feeding them three times per day.

Young fry

As they thrive into youth goldfish, you have the right to reduce the variety of feedings to twice daily.

Keep the young fish in their separate tank till they are large enough to endure in the adult tank the is big enough, for this reason the adults will not think about them food.

Breeding Tank Setup


To for sure the ideal chance of survive for her goldfish eggs, set aside a 10 to 20-gallon tank in i beg your pardon they deserve to develop and also hatch.

Fill the tank come a depth the eight inches v water from her adult tank. Usage a spawning mop to move the egg from the adult tank.

Water Parameters

Monitor the water temperature and also gradually increase it. It is in mindful the a sudden rise in water temperature can harm your goldfish.

Spawning wake up at temperatures in between 68 and 74-degrees Fahrenheit (20 to 23 degrees C).

Eggs hatch finest at temperatures of 75 levels (24 levels C) or above. Keep the pH in the 6.0 to 8.0 range.

The increased food input required throughout spawning may contribute to higher levels of waste in the tank.

Dirty water can promote the expansion of fungus in unfertilized eggs. This fungus deserve to spread to healthy and balanced eggs and kill the developing fry. Save your water clean by changing up come 20% of the water daily and also remove any kind of unfertilized eggs.


Install a kind filter to save your water clean. Choose one the produces a low existing as goldfish favor much more still waters.

A sponge filter or under gravel filter will execute well and also be for sure for the newly hatched fry. Installation an waiting pump will aid to aerate the water.

A heater can allow you to control the water temperature, rise temperatures as needed, or keep conditions consistent. Adjusting temperatures can assist stimulate spawning or control development times because that the eggs.

Frequently asked Questions

Breeding tank through young goldfish fried food (source)

How deserve to you call if a goldfish is pregnant?

Although a goldfish go not gain “pregnant,” she may be carrying eggs and ready to generate if you view her belly end up being rounded and full.

What carry out I execute if my goldfish lays eggs?

If your goldfish lays eggs and the male has actually fertilized them, you will either must remove the eggs or the parents if you want them come hatch and also the fry to develop.

This is straightforward to execute if the eggs have actually been laid on a spawning mop or various other removable item.

Raise the water temperature in the hatching tank to at the very least 75 levels Fahrenheit (24 degrees C), inspect for and remove any type of white eggs, and keep the water aerated and clean.

How plenty of babies carry out goldfish have?

A goldfish have the right to lay everywhere from a couple of hundred up to 1,000 eggs at a time.

However, some of these eggs execute not gain fertilized, some do not develop, and others may not hatch.

What perform goldfish eggs look like?

Unfertilized eggs will look milky white, while fertilized eggs are a transparent yellow.

After two or three days, look for a small, dark spot and also a curved black line in the egg, which are the eye and also spine of the developing fry.

How lengthy do goldfish remain pregnant?

Goldfish space not technically pregnant; they are egg layers.

However, the female can rapidly develop eggs and also can be ready to spawn once a month.

Do goldfish eat their babies?

Yes, goldfish deserve to eat the eggs or newly hatched fry.

The best means to avoid this is to set up a different tank because that hatching the eggs. A spawning mop provides it straightforward to eliminate the eggs and transfer them.

Closing Thoughts

Although goldfish space remarkably straightforward fish to treatment for, there are a few things to think about to properly hatch the eggs and also raise the fry.

See more: Pokemon Fire Red Pokemon Mansion Map, Pokemon Firered/Leafgreen Walkthrough:

Water conditions and temperature, aeration, and also separation from the parents will ensure healthy and balanced goldfish babies.

Feel totally free to share your experiences with reproduction your goldfish below!

What advice would you offer someone who is reproduction their fish because that the an initial time?