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How Long Does it Take for Fish Eggs to Hatch

Many people have the dream and idea to breed their fish at some point in time, but why not start now when it’s not complicated or troublesome.

Several fish species will reproduce naturally in the appropriate conditions while many others may need more commitment, but success is always fulfilling and gratifying. 

One of the most requested issues from people who are new to fishkeeping is how long does it take for fish eggs to hatch

The answer to that question is that: it depends on the type of fish. There are so many factors that can influence the lifespan of an egg, and this answer is no exception. Factors such as water temperature will play a huge role in determining how quickly your children hatch from their eggs. Some fish species require only 4-5 days to grow, while others may take up to 7 or more.

How Long Does it Take for Fish Eggs to Hatch?

If you want fish that spawn quickly, get yourself a pair of Angelfish. These guys are the MVPs when it comes to breeding, and they don’t require any special conditions whatsoever! You can even go from having no idea what these things do to being an expert breeder in less than two hours’ time—just buy some angelfish eggs at your local pet store and wait for them to hatch.

Angelfish are beautiful fish but can be challenging to take care of. Once you have an Angelfish pair and they’ve spawned, it’s time for the next step in their life cycle: taking care of all those eggs!

If you want to raise your own Angelfish and don’t have the time or dedication, let them eat their eggs.

If you’re not prepared for raising a baby fish from scratch, then do nothing and wait until they start eating their babies themselves.

Angelfish may not know how to take care of their eggs the first time they try, so it might take a few tries before you see them successfully caring for fry.

If they have never spawned before, then there is a good chance that they won’t succeed from the start.

Angelfish eggs incubate for 7 days, but you will know if your fry is actually viable in just two days. If the egg is white after 48 hours, it’s a sign that either they were never fertile or some bacteria killed them.

Where Did the Angelfish Eggs Disappear?

In some circumstances, you may not be able to find the Angelfish eggs even after there haven’t been any indications of aggressiveness by the progenitors. Reasonably, you will believe that they have consumed the eggs.

Angelfish have an exciting way of protecting their eggs. They put them in their mouth and transfer them to different areas, making it unlikely for the parents to eat those eggs again if they had already bred before.

In these instances, examine the behavior of your Angelfish.

If you see the Angelfish guarding an area of their tank, then it’s a good idea to check for eggs. 

If they’re throwing themselves at potential predators or anything that looks like food, there are definitely still some in there.

Also Read: Seed Shrimp – The Ultimate Seed Shrimp Guide

Goldfish Egg Hatching Time & Breeding


Goldfish eggs have a much different story than Angelfish. Some of the differences are that they each take care of their fry differently later on.

Fertilized Goldfish eggs are sticky and will cling to any surface they can reach. Once released, these Goldfish babies search for a safe haven until their mother has time to retrieve them back into the safety of her home in the tank.

When fertilized, eggs hatch in about a week. The hatching time depends on the temperature of your aquarium or pond; if it’s hot enough, they may hatch within three days.

On the other hand, it could take them up to 7 days and more to hatch if the temperature in the tank is too low and cold.

Goldfish are quite the carefree breed, but they will still take time to gather around and protect their eggs. The Goldfish’s lack of parental instincts make them easy targets for egg-eating predators like cichlids or other fish that may be lurking in your aquarium tank – this is why it would be wise to have plants on hand so you can offer some protection from these hungry animals!

Goldfish fry are constantly on the lookout for an escape from hungry predators. The smallest fry of all will find safety in a cluster near the top or bottom of plant leaves and out-growths to avoid being eaten by Goldfish larger than they are.

Frequently Asked Questions (FAQ)

How to Protect Fish Eggs in an Aquarium?

You’ll want to make sure you have the right equipment and know-how before breeding your fish. Some need more space or specific water conditions, so it’s important not to rush into this decision without knowing what is involved first-hand.

Knowing in advance that different species lay their eggs differently can help provide a head start for aquatic procreation of your own.

The most important thing you need to understand when breeding fish is their environmental requirements. 

Breeding any type of fish requires an understanding of its environment and what types of food are best suited for each one. 

For example, if you have too much water in the tank but not enough vegetation because these animals require live plants, give them something else to eat temporarily or add more greenery at least three weeks beforehand.

Some fish will lay their eggs in caves or isolated locations. To make sure they have all the resources to thrive, add a few things like wood and stones nearby as well.

Even with suitable hiding spots, your fish may eat their own eggs. Especially if they are new to parenting, the fry can be eaten by other tank mates as well.

The best way for you to protect and care for your newly hatched baby fishes is by placing them in a separate container that’s closed off from light exposure.

There is a different circumstance that constitutes fungal and bacterial diseases or infections.

Eggs are fragile and, thus, vulnerable to any potential diseases. Your primary concern should be the purity of your water during the few days before hatching. If you keep it pure for these few days, then there is an excellent chance that an infection or disease will not affect them at all.

Where Do Fish Lay Eggs?

Fish use their bodies to protect and care for eggs in a variety of ways. You must research the specific type of fish, but here are some general tips:

  • Utilizing plants. A fish will lay its eggs in a variety of ways. While some species like to hide their eggs, others simply choose the leaves and sink them into place with care.
  • Burying Eggs: Some aquatic creatures bury their eggs underground to keep them safe. However, when it is time for the egg to hatch, they must find a way back out of the ground.
  • Bubble Nests: Some species like the Betta fish are capable of creating nests of bubbles at the surface of the aquarium and lay their eggs there.
  • Swallowing the eggs: Many fish species store their eggs in a crevice or cavity to protect them from other predators. Some even swallow the eggs into their mouths to protect them and carry them around until it is time to release them back out again.
  • Vulnerably Exposed in the Open: Some species simply lay their eggs in the open spaces of an aquarium and then leave them be. This can work out fine if there are no other fish to eat these vulnerable offspring, but it is only natural that predators will hunt down this easy prey at some point.

How to prevent the eggs from getting consumed?

If such fish show signs of aggression, you should once again separate them but only for a few hours. This gives you a chance to reintroduce them later and hope for a more peaceful relationship. 

It is essential to protect the eggs of fish because predators can eat them. If you see signs that a predator is attacking or eating any potential offspring, simply remove it from harm’s way and keep them in isolation for safety.

If you want your eggs to survive, put the parents in a secondary tank and not with them. If this is an issue that’s already been solved for peace of mind, and you have any community tank, then do it on that too! It’ll only make sense if there are no grown-ups left around trying to eat their little ones after all.

Certain species of fish need to be near or with their young in order for them to survive and grow up healthy. In these cases, this is necessary because, without care from them, an offspring won’t make it through infancy.

If you are experiencing aggression in your home aquarium, be sure to separate the fish for a few hours. This gives both sides time and space to cool down before coming back together again with the hope of establishing better relations.

How to Know if fish eggs are fertilized or not? 

I bet you’re wondering how to tell if your eggs will hatch or not? 

First of all, make sure the parents are not eating their eggs and that there is a high potential for hatching success. 

The Angelfish eggs are so delicate in the early days that it’s hard to know whether or not they’ve hatched. If you want an accurate answer, be sure to wait for around a day or two before checking again.

As a symbol of new life, fertilized eggs change color, and you can see the faint dots that will soon form to represent eyes.

The eggs change color after 48 hours to tell the owner of potential hatching. Eggs that are not fertilized or caught an infection will remain white and opaque, while fertile ones turn pink with streaks on their shell.

The result of prolific mating is that you will see an increase in the fertility rate every time your tank mates spawn again and again.

You may not be successful on the first few tries. It is recommended to adjust the water flow as far away from the eggs you are trying to fertilize so that your fish have a higher chance of success in impregnating them with their sperm.

Fishkeeping Expert
Fishkeeping Expert
With years of collective fishkeeping knowledge, we are pleased to share the tank maintenance tips and fish care advice we've picked up along the way. Fishkeeping Expert is home to all fishkeeping tutorials and guides that will help you keep your fish healthy.


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