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Blue Axolotl Information & Care Guide for Aquarists

Do you want to add some exotic axolotl color variants to your tank? Then you can go for the blue axolotl, which is quite a unique and rare species.

Their dark bluish body tone with unique purplish external gills make them look different from any other color variants.

Blue axolotls are not any separate kind of color morph. Instead, they are melanoid axolotl with a much darker gray shade. They are easy to care for in a 20-gallon tank with proper filtration. However, one must have adequate experience in fish-keeping before adding them to the tank.

Species Overview

Axolotls are found in various shades. Whether it is their unique limbs and a smiling face or a wide variety in their color morphs, everything makes us a little more curious about them, isn’t it?

The most popular varieties of axolotls are black, pink, white, wild-type, golden yellow, and albino, even though there are plenty of other shades.

However, while having quick research on the color varieties, you must have heard of the blue axolotl. Well, if you love the color blue and axolotl species, then buying one can be a great option.

But before you purchase one, you need to know everything about this quirky little creature. Though you have heard the name at many places, there is a truth behind it. While there are many alluring images available of an axolotl blue, the fact is that there are no such axolotls of a true blue-colored morph.

The idea of the blue morph is a common myth. The axolotls that are considered as blue morphs possess a very dark gray shade.

They are genetically a melanoid axolotl, which is one of the most popular color variations among this group of salamanders.

Melanoids are usually available in various ranges of grey and black. But if you are lucky enough, you can get a grey one with a slightly bluish hue, commonly referred to as the blue axolotl.



The so-called ‘blue axolotl’ or dark gray-shaded melanoid axolotl comes with much solid color. They do not possess flecks or any other colors throughout their body. Sometimes, under lighting, they appear to be black or blue.

One of the greatest talents of these creatures is that they beautifully blend in with their surroundings. Hence, while keeping them in your tank, you might notice that they are either lightening or darkening.

However, no matter what color of a melanoid axolotl you are picking at its young age, ultimately, it will end up becoming more black.

Image by Ross Landy

At times, you might even find a heavily marked melanoid. In such cases, axolotls can appear to be much lighter in color, resulting in a light blue shade.

Besides, some Blue axolotl could have had melanoid parents that were completely black but still appear to have bright gold flecks on their skin.

Well, like all other variants, these are also amphibians by nature. These creatures possess a more eel-like appearance with little limbs.

Hence, they are popularly known as the Walking Fish. Even if they grow like any other amphibian, they retain many larval features in their adulthood.


Axolotls are usually neither too long nor too short in length. They possess a much moderate length, which makes them easier to care for in a medium-sized tank.

During its adulthood, an axolotl can reach up to a length of 11-12 inches. However, their growth and body length are highly dependent on the type of food they are getting in their diet.


While caring for a blue axolotl, you can be worried about the longevity of this species. Well, let us tell you these axolotls are very hardy. So, if you offer them the proper range of care with the right water parameters and good food, they can live up to 15 years.


Are you thinking of having an blue axolotl in your home tank? Then, you must know all the nooks and corners of caring for them.

If you already have experience in caring for melanoid axolotls in aquariums, there is nothing to worry about adopting any extra measures in your style of care.

All you need to do is keep the following things in mind:

  • While handling it, you should use a fishnet. It is better not to handle them with bare hands as it can harm the upper layer of their skin.
  • The water in the tank of your axolotl must be very clear.
  • You must not keep them with any tank mates that can harm them or nip their external gills. Their tank buddies should be suitable to their temperament and water parameter requirements.

Tank Setup

Axolotls are quite similar to the other types of freshwater fish when it comes to caring for them in a tank. Hence, you can easily set up a tank that meets the right water parameters. Here is a quick tank setup guide for your blue axolotl.

Tank Size

If you want to keep one blue axolotl in your tank, a 20-gallon capacity will be enough. It is better to focus on the length of the tank rather than the depth.

These particular gray-shaded melanoids prefer to float or roam around at the top of the tank. So, an aquarium with a minimum size of 2 ft. will do good. Moreover, your tank must have a lid since axolotls are good jumpers, and they might try to jump out of your tank.


Good filtration is crucial for the tank of axolotls. They are usually messy eaters, which can make the leftover foods ruin the water quality of their tank.

So, for a blue axolotl tank, you can opt for a canister, or a sponge filter that does not create much turbulence in the water flow yet keeps the tank clean. Also, you must perform regular water changes to keep them healthy.

Water Parameters

Maintaining a good water condition is vital to retain the good health of your axolotl blue. The water you are filling into the tank must have a temperature around 68° Fahrenheit and strictly not more than that.

Also, take note of the pH range of the tank. The pH level of the tank must not cross the mark of 6.5-8.

Tank Décoration

There are no specific restrictions about what to add and what not in your tank. You can simply add whatever you like. Just keep one thing in mind the tank must have sufficient space to hide.

You can add caves and aquarium plants to the tank where your blue axolotl can hide and rest peacefully. Also, make sure the décors do not have any sharp surface, which can harm the sensitive skin texture of your axolotls.


You have to be very careful while deciding the substrate for your axolotl tank. They can thrive easily in a bare bottom tank. However, if you want to add a substrate, it’s better to use sand.

But make sure you are not adding small stones into the tank, as axolotls are much careless bottom eaters. They might gulp such stones, causing harm to their intestine.


Lighting is a very crucial thing to look at while setting up the tank of a blue axolotl. It is better to maintain the optimum day/night cycle in their tank.

Besides, they are pretty sensitive to bright lights. So, make sure you are keeping them under low lighting conditions.

Food & Diet

The diet for your blue axolotl must be highly nutritious to meet the unique needs of these amphibians.

They usually require a minimal diet that you can easily arrange from time to time. When caring for the younger ones, you can feed them once a day regularly. And to care for older axolotls, you should feed them once every two or three days.

Axolotls are carnivores. Hence, their diet should have a lot of protein in it. So, here are some food options that you can offer:

  • Frozen bloodworms
  • Live black-worms
  • Red wigglers
  • Nightcrawlers
  • Small micro-worms
  • Soft sinking salmon pellets

Is it suitable to keep blue axolotl for beginner aquarists?

Blue axolotls are not as common as a species like others. So, to care for them properly, you must meet their unique needs.

Well, it can be challenging at times to tackle them while keeping them in a community tank.

Hence, if you are a complete beginner in fish care, we would suggest you not go for them. A prior experience in fish caring can help you better in petting them.

Also, if you are thinking of taking care of them in your tank, make sure you are checking on them frequently to know whether they are fit or need any extra attention. In case you spot any signs of illness, you must contact the vet as early as possible.


It will be great to have such exotic-looking blue-hued axolotls roaming around in your home tank. Isn’t it? All you’ll have to do is ensure that the care you are offering them is top-notch.

Do you know there is one fun fact about blue axolotl that can make you fall in love with them more?

They can recognize you if they encounter frequent interactions. So, if you want to have such a cute little interactive pet at your house, make sure to learn all its care-related details.