Why Do Betta Fish Makes Bubble Nests?

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Have you ever seen a cluster of bubbles at the top of your betta’s tank? Well, if you are wondering what that thing is – or you want to know about betta fish bubble nests, look no further, in this piece, we will be showing you all you need to know about why do betta fish make bubble nests.

What Is Betta Fish Bubble Nests?

Betta fish build bubble nests. It is an important part of their breeding process. However, building a bubble nest is an instinctive thing for a male betta fish. He does this even without the presence of the female betta. More than 90% of male bettas will build bubble nests. They have no other reason to do this except for a natural urge. If you see a nest in the tank, it’s a sign that your betta is very healthy and comfortable. You need to also understand that there isn’t a normal size as well as a normal frame for a betta to build his bubble nest. Each betta has its own unique pattern, and what yours have will be different from the other betta breeder.

A lot of species make bubble nests. All of these creatures blow bubbles to the surface and collect it all to form a relatively big nest. These nests are built up in a spot where oxygen is absorbed. This simply means they require a place where they can be attached to like plants or debris in the water. It is a natural phenomenon made by the male on very rare occasions. Building a nest is totally up to the male bettas and there is nothing one can do to trigger it. Now, you understand why there have to be enough plants in your tank. It is not only design but a necessity for your betta to reproduce young ones. A lot of people tend to wonder why male bettas do this; the answer to that is no longer farfetched.

How Do Betta Fish Make Bubble Nests?

How is a betta fish bubble nests made? It’s a natural process that could happen in the tank or the wild. The fish during this period blows out bubbles; making a relatively loud noise while at it. Once the bubbles are produced, they are placed at the surface of the tank and they trap oxygen in through its hold. Saliva is used to attach the betta fish bubble nests and a strong and durable shape. All of which is to build a perfect spot to keep the eggs together.

Sometimes, a betta will build bubble nests weekly or even monthly. Sometimes, they do it daily. Also, these nests are nothing but bubbles. Some betta fish bubble nests are known to be an inch thick and a span of a full corner. You need not worry if your fish doesn’t build bubble nests; this doesn’t mean that it is unhealthy and unhappy. There are lots of other factors that define the health and mental state of your betta fish; some of which are the age of the betta, the water management level, and feeding. An interesting reason why your betta may not blow a bubble could be as a result of the filter installed in your tank. If a filter current is too strong at the tank’s surface, then it will be hard for your betta to build a bubble nest.

In rare cases, the female betta might also stay to protect the eggs. But this occurrence is only possible with few species such as Aphrophilus. Betta fish on the other hand; the male care for the eggs as well as the newly hatched babies.

How Does A Betta Fish Bubble Nest look like?

If you don’t know what a betta fish bubble nest looks like, then you’d probably see it if yours creates one. It is as beautiful as the fish that creates it. The looks and the dimensions of the egg vary in different ways. While larger species can support more offspring, they tend to produce larger nests. However, this is not the case with every one of them. It all depends on several factors and traits. The same fish may not always create the same size of the bubble nest.

Some nests have unique bubble shapes, while some other types of nests are made of very small bubbles and tend to look more like foam. Some nests are spread out, while other bubbles are condensed. Sometimes, the size of the bubble nest is defined by the age of the fish itself or the presence of the other fish inhabiting the same environment.

Tips To Help Your Betta Fish In Bubble Nest Building

A few factors will help in creating the right environment for your betta fish and promoting your fish to build a bubble nest. Of course, not finally having bubbles in the tank doesn’t mean your tank is not comfortable. You still have to play your part by creating a conducive environment that will encourage and enhance production. If you wish to see betta fish bubble nests, here are some things you can do.

  • Floating plants or debris: you can create a scenery of the wild in your tank by making floating debris using plants such as amazon sword plant leaves. You can also use plastic cups as that will often end up with bubbles underneath them. You could also opt-in for pringles can or improvise and get anything that can float on the tank’s surface. However, you should make sure that whatever you are using is not toxic.
  • Make sure your filter is set to a gentle flow – especially when this causes a current to build upon the tank’s surface.
  • Adding another betta tankmate will increase the chances of the host to build betta fish bubble nests. You could add a strange male or a female in the tank.
  • Make sure the temperature is warm enough. A tank heated to 78 – 82 degrees Fahrenheit will likely create the perfect environment for your betta to build his nest. You can always control the temperature of the water using a heating lamp or heater that’s the right size for the betta. By the way, you need to avoid overheating your fish. You don’t want to harm your betta while trying to help the betta feel more comfortable with its surroundings. The source of heat you find should be perfect for 2 – 3-gallon tank and make sure the temperature stays within 78 – 82 degrees Fahrenheit. This will help your betta get ready to mate and breed.
  • Keeping the water clean is another factor. When your betta fish is always in need of clean water, the urge to build a nest will not be there. If you want your betta to pick interest in building a bubble nest, then you should make sure the water stays clean always.
  • You should test the water – in the wild, bettas live in acidic water. All you have to do is make sure the pH level of the tank water is appropriate and suitable for your fish’s health. It is an affordable way of enhancing your betta’s health. Pick up the test kit and test for the acidity of the water regularly to make sure it’s not turning to an alkaline which is known to be harmful to your betta.
  • Decorate the betta’s tank – just like humans will feel relatively bored while living in a home that has no furniture and is devoid of décors. Not good, right? Well, the same thing applies to a betta fish. Bettas enjoy having decors and plants in their tank. You can spice things up by adding a hammock, a castle, or tank plants. Just make sure the decors and plants you are adding to the tank are colorful and unique. The need for a tank décor should never be underestimated. To learn about the best plants for betta fish you can check our other articles.
  • Make sure the tank’s perfect. A half-moon or concave tank will be a bad idea. They aren’t suitable for bettas; this is due to the fact that bettas are anxious creatures, and having them in a tank that obscures proper vision will add to the anxiety and lead to mental and overall health deterioration. In addition to this, you shouldn’t keep your betta in a small tank. Bettas won’t be able to build bubble nests in small tanks. Secondly, contrary to what many people think, bettas only thrive in big tanks and spacious environment.
  • Male bettas are susceptible to the presence of female fish who they see as the perfect partners. In this entire process, all a female has to do is to swim by, and a male betta will be prompted to start building a bubble nest. Also, if there are other male competitors in the tank, then there is a high probability that the male betta will be forced to build his nest.

There’s also the probability that you just don’t see the result of the bettas work because it is butted up under something floating. A betta fish will always prefer floating objects and plants when building a bubble nest.

Bubble Nests And How Breeding Works?

At this point, you already know the importance of a bubble nest to a betta fish’s breeding process. Breeding as far as betta fish is concern takes a whole lot. It is a process that tends to put a whole lot of responsibility and lots of demand on both the female and male betta fish, but mostly more responsibility lies with the male betta as the female betta only needs to spawn the eggs after mating. Once the female is done releasing are eggs, they make betta then collects her egg and stores them in his mouth till he gets to his bubble nests. It is in the bubble nests that proper incubation takes place.

Most bubble nest making fishes don’t require the fry to hatch – just for a few days at most. But during that process, the male parent will guard the spawned eggs with his life. He will watch over the eggs to make sure they aren’t stolen and eaten by predators. They also make sure the eggs stay put with none of it falling back into the water. All potential threats are warded of including female bettas who have a knack for eating eggs.

Even after successfully hatching, the young bettas can’t survive on their own instantly, they may remain in the bubble nest under the watchful eyes of the male betta. This will continue until its certain that they all can now fend for themselves. This entire birthing process only happens for a few days. How fast they can leave the nest depends on the season as well as the age of their male parent. It is also determined by some other factors.

Do All Bettas Build A Bubble Nests?

It is important to note that not all bettas build nests. If your betta doesn’t make one, it doesn’t mean your betta is bad or unhealthy. Bettas in captivity don’t often build nests. Your betta may be healthy, and happy, he just might not be interested in a mating yet!

The Frequency of Nesting By Bettas:

What’s the frequency of nesting by bettas? Just as it is with the size and everything else, the frequency of nesting is as unique as the fish itself. While some male bettas including some other species will build bubble nests daily, some other bettas might have a monthly cycle. Some are weekly or periodic. However, some don’t make betta fish bubble nests at all, while some require external stimulation to be able to build nests of their own. It is also possible for a betta to change his building cycle, so that he may go from daily to creating bubble nests monthly and then taper off to almost weekly. Again, you need not be alarmed when you notice these changes.

Why Do Bettas Keep Their Eggs In The Bubble Nest?

Bettas keep their eggs in the bubble nest to protect them from predators and natural accidents. Once these eggs are released by the female bettas, the eggs are taken in the betta’s mouth down to the betta’s bubble nest so that they will be stable and be out of reach for hungry predators. This is where and when the male paternal instinct kicks in. The male bettas will take care of their eggs by keeping watch at all times to make sure that none of the eggs is eaten by either a female betta or any other fish.

Some Reasons Why Your Betta Won’t Build Bubble Nests

Even though we talked about the fact that you need not worry when your betta doesn’t build a bubble nest, there are some avoidable reasons why your betta isn’t building one. Some of these factors include:

  • Not just the right age.
  • Poor health
  • Strong currents in the tank as a result of improper filtering system.
  • Coldwater.
  • Absence of plants and decors in the tank.
  • Poor water management and cleanliness.

These factors vary from betta to betta. Some bettas don’t need decors and plants to build bubble nests. Some also build their bubbles in plain sight.


What is Bubble Nest: It is built by several species of fish, as well as frogs and eels. Just as the name suggests, they make bubbles that are brought together to form a nest. This nest is used as a temporary haven for their eggs and young ones. The nests are often located beneath plants or debris. Being attached to something at the surface lets them be oxygenated by the air present at the surface of the pond or tank.

How To Improve Their Productivity:

  • Make sure the betta is in a safe tank all the time. Also, the water needs to be in good condition all the time.
  • Introduce a female betta in the tank.
  • Maintain proper water temperature – the perfect temperature is anything within 78-82 degrees Fahrenheit.
  • Install decors and plants in the betta’s tank.


A betta fish is an interesting fish to have, but you need to know how to take good care of it. Watching the male create a bubble nest can be interesting. This phenomenon is about building an environment that is rich in oxygen to aid the hatching of the eggs. A male doesn’t necessarily need to make to build a bubble nest. If you think the inability of your betta to build a bubble nest is a result of the poor environment, you can work on that and see to it that the environment is enhanced. Make sure the environment stays clean and has the right plants and decors to enhance its productivity. No matter what, just make sure your betta stays healthy always and just because your betta is building any nest now doesn’t mean it is not healthy. Play your part and let him enjoy his environment.

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