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How To Identify Dead Axolotl Eggs?

Axolotls, also called the Mexican walking fish, are unique creatures usually confused for some type of salamander.

Axolotls usually lay eggs several times a year, especially during the winter when the temperature drops. As a responsible axolotl owner, you need to determine whether axolotl eggs are dead or not.

You can easily determine whether an axolotl egg is dead or alive by its color and shape. A live axolotl egg is usually black or white, while a dead axolotl egg is milky and cloudy and has an odd shape.

In this article, we will highlight everything you need to know about dead axolotl eggs, from how to determine whether an axolotl egg is dead to ways of preventing this from happening. 

3 Signs To Identify Dead Axolotl Eggs

Generally, it is not all axolotl eggs that will be fertilized successfully. This means you may need to separate the dead eggs from the live ones.

However, you can use color, shape, and air bubbles to identify whether an axolotl egg is alive or dead.

Axolotl eggs have milky and cloudy color
Axolotl eggs have milky and cloudy color | Credit: Jules Askalotl / YouTube.com


A great way to determine if an axolotl egg is dead is through color. A live axolotl egg is usually black or white.

However, some axolotl eggs may have unusual colors because of their genetic makeup, like the melanoid axolotl.

On the other hand, a dead axolotl egg is milky and cloudy.

Shape and Swelling

A live axolotl egg size is between 1.1-1.5 cm and does not have visible swellings. However, dead axolotl eggs usually have an odd shape swelling, and you will notice a little elongated grey bean-like things in the egg jelly.

A dead axolotl egg is usually around 0.2 cm in size.

Miscreation or Bubbles

A live axolotl egg doesn’t usually have any air bubbles. If you notice any air bubbles, it indicates that the egg may be dead.

This is because air bubbles usually happen because of the egg yolk’s dissolution in the water.

Why Is Your Eggs Axolotl Death

There are several reasons why an axolotl egg can die, and some of them are stated below:

  • birth defects
  • unsuitable living environment
  • inadequate air
  • dirty tank
  • wrong temperature
  • impact during movement

Birth Defects

An axolotl egg can be dead due to birth defects. For instance, an axolotl egg will be dead if the male spermatozoa do not fertilize the egg.

Another thing is that an axolotl egg can die if the female axolotl is young (less than 18 months).

This is because young female axolotl cannot lay their eggs to get fertilized in large numbers.

Also read: Pregnant Axolotl Symptoms

Unsuitable Living Environment

You can have a low hatching rate if you house your axolotl egg in an unsuitable living environment.

For instance, if you leave the egg with the broodstocks, there is a chance that the adult axolotl will ingest the eggs and even the hatchlings.

Also read: Full Requirements & Water Conditions for Axolotl in Captivity

Dead Axolotl Eggs
Dead Axolotl Eggs | Credit: Jules Askalotl / YouTube.com

Inadequate Air

An axolotl egg requires oxygen to stay alive. However, if there is not enough air, an axolotl egg can die.

This is why it is recommended that you spread out your axolotl eggs properly in the tank, and there is enough air aeration.

Also read: Do Axolotls Need Air?

Dirty Tank

Like adult axolotl, your axolotl egg can die if you house them in a dirty tank.

This is because a dirty tank will lead to bad water quality, leading to infections. A dirty tank will also affect the level of air in the water.

Also read: How To Clean Axolotl Poop: 3 Basic Ways

Wrong Temperature

Axolotl eggs require a cool environment from direct sunlight to stay fertile. The ideal temperature suitable for keeping an axolotl egg alive for around 20 or more days is 18-20oC.

However, you will need to put them at a temperature of about 25oC a week before they hatch.

Therefore, an axolotl egg can die if you house them at a temperature more than or below the ideal temperature.

Also read: Axolotl Temperature (Tips to Maintain an Ideal Temperature)

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Impact During Movement

There is a high chance that an axolotl egg can die when you are moving them because they are shaken too much in transit.

This is why you need to be extra careful when moving axolotl eggs to help prevent them from dying.

Also read: How To Remove Axolotl Eggs From Tank

What Should You Do With Dead Axolotl Eggs?

The first thing to do is to separate the dead axolotl eggs from the live ones to help prevent the spread of the fungus.

After removing the dead egg, you will need to change the water regularly. You can then dispose of the dead egg in the garbage can or feed it to the adult axolotl.

Note: You should ensure your hands are free from any smell when removing the eggs.

Furthermore, ensure that you don’t touch live eggs with soap or hot water to help prevent reducing the oxygen level in the tank.

How Do You Keep Axolotl Eggs Alive?

Normally, a female axolotl can lay about hundreds of eggs at once. However, they have a low survival rate, and it is recommended that they put in efforts to help maintain the survival rate.

Some of the things that you can do to keep axolotl eggs alive are:

  • Place the eggs in shallow, clean, cool, and calm water.
  • Keep your axolotl egg in water that is around 18-20oC in temperature.
  • Hatch your axolotl eggs in 25oC water.
  • Ensure your axolotl eggs are properly spread out in the tank and provide enough air aeration.
  • Remove the parent axolotls from the tank.
  • The water in the axolotl tank should not be soft or chlorinated
  • The water in the tank should be filled right to the top
  • Change the water in their tank daily.
  • Be careful when moving the egg to help ensure you don’t damage the outer jelly of the egg.
  • Always sort out the eggs to help ensure you remove the dead eggs.

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Are All Axolotl Eggs Black?

It is not all live axolotl eggs that are black. The color of an axolotl egg depends on the genes of the mother axolotl, and a live axolotl egg is usually either black or white.

How do I know if my axolotl egg is fertilized?

You can determine whether an axolotl egg is fertilized or not by looking at its size and color.

A fertilized axolotl egg is usually 5x larger in diameter than an unfertilized egg. Furthermore, the color of a fertilized axolotl egg is black or white with protective jelly surrounding i

How do you dispose of a dead axolotl?

The best way to dispose of a dead axolotl is to wrap it in a plastic bag or container and then put it in the household garbage.

You can also dispose of your dead axolotl by burying it in your yard. However, you should avoid flushing it down the toilet as this can spread disease.


A female axolotl can lay around hundreds of eggs at once, but the eggs have a low survival rate.

This is why it is your responsibility as the owner to determine whether an axolotl egg is dead or alive. By looking at the color, shape, and swelling, you can determine whether an axolotl egg is dead.

A live axolotl egg is black or white, while dead ones are milky and cloudy and usually have an odd shape. You should try to remove the dead axolotl egg immediately you notice it.

Also read: Where Can I Buy Axolotl Eggs?

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