5 Reasons Your Angelfish Eggs Are Turning White

Last Updated on 2023-12-18

One of the most concerning issues angelfish keepers experience when breeding is when angelfish eggs turn white. Breeding angelfish can be an exciting experience, but identifying any potential issues you might face as you go through the process is essential.

In this article, we will discuss the possible reasons for angelfish eggs turning white and what steps can be taken to prevent this from happening. So, keep reading!

Key Takeaways:

  • Angelfish eggs can turn white due to various reasons, including being unfertilized, fungal growth, low oxygen levels, damage during spawning, and poor genetics.
  • White and fuzzy angelfish eggs indicate a fungal infection, often caused by poor water quality and stress in the fish.
  • Healthy angelfish eggs should be transparent with a yellow/orange tinge, and discoloration can signal issues such as fungus, bacterial infection, or algae growth.
  • Factors affecting angelfish egg appearance include water quality, diet, and fertilization.
  • To prevent unfertilized angelfish eggs, select compatible mates, maintain optimal tank conditions, provide a nutritious diet, monitor breeding behavior, and create a suitable breeding environment.

Why Are Your Angelfish Eggs Turning White?

Here are a few reasons that your angelfish eggs could be turning white.

Unfertilized Egg

The most common reason for angelfish eggs turning white is because it’s unfertilized. When angelfish breed, the male fertilizes the eggs by releasing his sperm over them. If the eggs are not fertilized, they will start to turn white within a few days. Unfertilized eggs will either be reabsorbed by the female or will be eaten by other fish in the aquarium.

Fungus Growth

When you see your Angelfish eggs turning white, another common cause is fungus growth. Fungi thrive in moist environments with organic matter to feed on, making angelfish eggs a prime target. When the eggshell is compromised due to poor water quality or physical damage, fungi can penetrate the shell and infect the embryo inside.

Low Oxygen Levels

Another reason why angelfish eggs may turn white is low oxygen levels in the tank. If there isn’t enough oxygen available for the developing embryos to breathe properly, they may die and turn white as they decompose.

Damage During Spawning

Another reason why angelfish eggs may turn white is damage during spawning. Angelfish are known for their aggressive behavior during breeding, which can lead to damage on egg surfaces if not careful enough during the spawning process. These damages can allow bacterial growth into eggs – leading to turning white over time.

Poor Genetics

Sometimes, genetic factors play a role in why angelfish eggs may turn white too early in the development stages. This issue usually occurs when two unrelated fish mate together or if one parent has poor genetic traits that are passed down to their offspring.

Why Are Your Angelfish Eggs White and Fuzzy?

When angelfish eggs turn white and fuzzy, it clearly indicates a fungal infection. Fungal infections can occur due to several reasons, including poor water quality, high stress levels in the fish, and contamination from other infected eggs in the aquarium. Once the eggs become infected with fungus, they are unlikely to hatch, and the angelfish fry will not develop.

Fungal growth on angelfish eggs appears fuzzy or mold-like on the egg’s surface. The fungus grows out of the shell and into the water column around it, creating an extensive network of hyphae that eventually cover much of the egg’s surface area.

Fungal infections on angelfish eggs are most commonly caused by a type of fungus called Saprolegnia. Saprolegnia is a filamentous fungus that can grow on any organic material in the aquarium, including fish eggs. This fungus is naturally present in most aquariums but becomes problematic when poor water conditions favor its growth.

Fungal infections can quickly spread from one egg to another and from one fish to another if not treated promptly. If you notice white or fuzzy growth on angelfish eggs, it is important to take immediate action to prevent the fungus from spreading.

What Color Should Angelfish Eggs Be?

Healthy angelfish eggs should be transparent or translucent with a yellow/orange tinge visible inside them (the developing embryo). If you see any discoloration or cloudiness within them before hatching occurs (usually around 60 hours after laying), this could indicate a problem. Also, here’s what you need to know if you notice these colors:

  • White or opaque: This indicates that either fungus has taken hold or that no fertilization has occurred.
  • Brown: Brown eggs suggest a bacterial infection.
  • Green: Green Angelfish eggs indicate algae growth on/in/around the egg.
  • Reddish-brown: Indicates blood spotting within an already fertilized egg—this usually results from rough handling during transfer/movement.

Factors Affecting The Appearance of Angelfish Eggs

It’s important to note that the appearance of angelfish eggs can vary depending on factors such as genetics, the age and health of the fish, temperature, and other environmental conditions. Here are three of the biggest factors affecting the color of your Angelfish eggs.

FactorImpact on Egg ColorTips/Recommendations
Water QualityDiscoloration, Fungal GrowthMaintain optimal water conditions and always perform regular water changes.
DietColor Change, HealthProvide a varied diet with high-quality flakes, pellets, live foods.
FertilizationVisible DevelopmentMonitor the appearance of eggs for signs of fertilization.
Ensure that embryos are developing properly.

Water Quality

Water quality plays a significant role in determining the color of your angelfish eggs. Poor water quality can lead to discoloration and even fungal growth on the egg surface – which could make them appear white and fuzzy. 

Make sure to maintain optimal water conditions by regularly testing for ammonia, nitrite & nitrate levels within the tank environment; keeping up with regular maintenance routines, such as weekly water changes, helps maintain a healthy ecosystem balance within the tank environment.


Another factor that could affect the color of your angelfish eggs is diet. Providing proper nutrition to your fish is essential in ensuring they remain healthy during breeding & laying periods. A varied diet consisting of high-quality flakes, pellets, or frozen foods together with live foods like brine shrimp will help keep females well-fed during these periods, thus producing healthy offspring.


When angelfish eggs are fertilized, the developing embryos inside may become visible as small black dots or lines. The eggs may also appear slightly cloudy or opaque, which can be a sign of fertilization and development.

If you’re breeding angelfish, it’s important to monitor the appearance of the eggs closely to ensure that fertilization is occurring and that the embryos are developing properly.

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How to Prevent Angelfish Eggs From Being Unfertilized

Breeding angelfish is an exciting and rewarding experience for aquarium enthusiasts. However, it can be frustrating when eggs fail to fertilize, leading to a lack of offspring. Fortunately, there are several steps you can take to prevent angelfish eggs from being unfertilized.

Pairing the Right Mates

The first step in ensuring fertilization is pairing the right mates.  When introducing a breeding pair, it’s important to select Angelfish that are healthy and in good condition. Angelfish are known for their aggressive behavior towards one another; therefore, it’s essential to introduce compatible pairs that will get along well with each other. 

Ensure Optimal Conditions

Providing optimal conditions in your aquarium environment is crucial for successful breeding outcomes. The water should be soft, slightly acidic, and within a specific temperature range of around 78-84°F. Also, make sure that your water is free of toxins and pollutants and that your fish have plenty of hiding places and enough space to swim freely.

Feeding a Nutritious Diet

Angelfish require a nutritious diet to remain healthy and active during breeding. Both male and female angelfish require a diet high in protein, which is essential for producing healthy eggs and sperm. Feed them high-quality flakes or pellets supplemented with live foods like brine shrimp or bloodworms.

Monitoring Behavior

Breeding angelfish display specific behaviors that can indicate when they are ready to breed. During the breeding season, males will become more aggressive towards females as they prepare for spawning.

Other behaviors include courtship displays, lip-locking, and cleaning a breeding site. By monitoring your angelfish behaviors, you can determine when they are ready to breed and take steps to ensure successful fertilization.

Provide A Suitable Breeding Environment

Angelfish require a specific environment in order to breed successfully. This includes a flat surface, such as a broadleaf plant or a breeding cone, where the female can lay her eggs. It’s also important to ensure that no predators in the aquarium may eat the eggs or fry.

Removing Unfertilized Eggs

If you do notice any unfertilized eggs in your tank, remove them immediately, as they can lead to bacterial growth and harm healthy eggs remaining in the tank. Also, removing dead fry after hatching helps maintain good hygiene practices surrounding the tank’s overall ecosystem.

How Can You Tell If Angelfish Eggs Are Bad?

As you go through the angelfish breeding process, knowing how to identify any potential issues with the eggs is essential. It may seem like a daunting task, but knowing how to do so will surely help. So, let’s discuss some signs that can help you determine if your angelfish eggs are bad.


One of the most apparent signs that angelfish eggs may be bad is discoloration. If the eggs have turned white, gray, or brown instead of their original clear appearance, it’s likely they’re not viable.


Cloudiness in the water surrounding the eggs is another sign that they may be bad. This cloudiness may be due to bacterial growth, harming developing embryos and leading to unsuccessful hatching rates.

Foul Odor

A strong odor from the tank can also indicate that the angelfish eggs are bad. The smell could come from dead eggs or bacteria growth caused by non-viable ones.

Fungus Growth

Another sign that angelfish eggs are bad is if you notice any fungal growth on the eggs. The appearance of white, gray, or green spots on the eggs can identify fungus growth. If you notice any fungus growth on the eggs, it is a sign that they are not viable and should be removed from the tank immediately.

Lack of Development

If your angelfish eggs haven’t developed within 48-72 hours of being laid, it’s possible they’re not fertilized or were damaged during spawning. In some cases, the eggs may start to decompose and produce an unpleasant odor, which is another indication that they are not viable.

Egg Abandonment

Angelfish parents will usually attend to and protect their offspring until they hatch. Therefore, if you notice them abandoning their nests or ignoring certain clusters of eggs entirely, this could indicate something wrong with these particular eggs!

Angelfish eggs turning white

How Do You Remove Unfertilized Angelfish Eggs?

Breeding angelfish can be a fascinating and rewarding experience for aquarium enthusiasts. However, sometimes, things don’t go as planned, and eggs may remain unfertilized. Unfertilized eggs can pose a risk to the health of your fish tank’s ecosystem and should be removed promptly. Here are some steps on how to remove unfertilized angelfish eggs.

Wait for The Eggs to Hatch

It can be difficult to determine if an egg is fertilized or unfertilized, especially if it’s the first time breeding angelfish. Sometimes, the eggs may take a few days to develop and fertilize. Therefore, It’s important to wait at least three to four days before removing any eggs, as it can take that long for the eggs to develop.

Identify Unfertilized Eggs

If you’re unsure whether an egg is fertilized or unfertilized, you can use a flashlight to shine light through the egg. Fertilized eggs should be clear with visible black dots or lines, which are the developing embryos. If you notice any white or opaque-looking eggs that haven’t hatched within 48 hours after being laid, they’re likely not fertilized.

Remove Unfertilized Eggs

Unfertilized eggs can develop fungus and other diseases, which can contaminate the water and harm other fish; therefore, they should be removed. Using a small net or turkey baster, gently remove the unfertilized eggs from the tank’s bottom surface or from where they’re attached. Be careful not to disturb other healthy eggs in the process!

Dispose of Unfertilized Eggs

Once removed, dispose of unfertilized eggs by discarding them into a separate container away from the main fish tank, or you can bury them in the garden as fertilizer.  This helps prevent risks of bacterial growth while also reducing potential harm to healthy offspring in your tank.

Monitor Tank Conditions

After removing the unfertilized eggs, monitor water quality conditions closely for any changes in pH levels and ammonia/nitrite/nitrate levels over time to ensure optimum tank conditions. It’s also essential to continue to monitor the remaining eggs for signs of development. Doing these will provide the best environment for your tank’s beloved inhabitants! 


Should You Remove White Angelfish Eggs?

Yes, it’s best to remove any white angelfish eggs from the tank as soon as possible. These eggs are unlikely to hatch and can potentially harm the other healthy eggs in the same batch if left untreated. Removing these eggs quickly will prevent bacterial growth and maintain water quality conditions for the remaining healthy eggs inside your tank.

Will Fish Eggs Hatch with Fungus?

When fungus attaches to the angelfish eggs, it will kill the eggs before they hatch.If fungus gets on angelfish eggs, it can stop them from hatching and kill them. So, it’s important to watch the eggs closely and prevent fungus growth if you can.


In conclusion, angelfish eggs turning white is a clear indication that they are not viable and will not hatch. Various factors can cause this discoloration, and It’s essential to remove these eggs promptly to prevent any potential harm to other healthy offspring in your tank.

By monitoring water quality conditions closely and providing optimal care practices, aquarists can significantly increase the chances of successful hatching rates while ensuring a healthy environment for their fish and their eggs.  


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