March 14

Sarah Robertson

How Long Do Pregnant Betta Fish Takes to Breed?

Betta fish, also known as Siamese fighting fish, are one of the most popular fish breeds. The jewel-toned coloring and flowing fins of betta fish make them a fantastic addition to any fish lover's collection.  If you have Betta at home, then you might be wondering how long does it take for pregnant betta fish to breed?

During mating, the female will release eggs and the male will fertilize them externally. The male will build a bubble nest in advance of mating in order to prepare for the eggs. These eggs take two to three days to hatch.

 The fry will consume the yolk sack from the moment they hatch, relying on their parents for primary care. It generally takes an extra two to three days for them to start swimming and become autonomous after the eggs hatch.

The male is responsible for protecting and tending to the developing fry until they are born ,which takes about two weeks. Once the fry are born, the parents will release them into a separate container so that you can raise them on your own until they are ready to be released back into the tank with their parents.

For How Long Do Betta Fish Stay Pregnant?

A female betta can keep eggs for one to two weeks. A male that is ready to mate might be brightly colored, especially when initially introduced to the female. This color change will not take place until the female and male fish are in the same aquarium. 

A female Betta's ovipositor houses eggs for only a few weeks. This is perfectly natural since the eggs aren't developing into Betta fish youngsters while they are within her. After being set free, the Betta eggs will mature and hatch in approximately three days. When the babies hatch, they are known as "fry" and are quite tiny.

Is Your Betta Fish Pregnant And How To Spot It

How to Spot Your Pregnant Betta Fish

The most apparent indication that a Betta is pregnant is the appearance of white stripes on her sides, as well as a visible white dot on her belly. The ovipositor, or egg-laying organ, is the white dot seen on her belly.

You may also observe that your female Betta's stomach bulges, in addition to the white markings. The growth in stomach size is another apparent signs of pregnancy.

Here are some of the things to look for if you're wondering whether your betta is pregnant:

Physical Indicators:

Note the Betta female's stripe pattern. She is fertile and making eggs if she has strong vertical stripes, which are most often white in color. There will be streaks of lighter color on her body rather than perfect lines.

Look for a white tube or dot on her belly. Her ovipositor is visible if it's there, indicating that she's getting ready to lay eggs. This white spot is the ovipositor, or egg spot. 

Do All Female Bettas Have Egg Spots?

Yes. This is the tube through which she will discharge her eggs.

How Can You Tell if Your Female Betta Has Eggs?

A gravid betta fish may have an enlarged belly and appear puffy. The tip of her ovipositor will protrude. From above, your fish's rounding is most apparent.

Your female's heavily rounded abdomen in the absence of light stripes and a white spot on her belly might suggest another condition, such as constipation or dropsy.

Behavioral Indicators

At the surface of the tank, notice the male Betta's tank. Has he constructed a bubble nest? He is prepared to mate if that's the case. The greater number of bubbles, the better. The male starts to build the bubble nest after the female is being introduced. This process may take anywhere from 12 to 24 hours.

Betta fish in bowl: Keep an eye on them. The male Betta will continue circling around the female and squeezing the eggs out of her ovipositor if she is satisfied with the nest. If she does not accept the offering, she will destroy the nest and he will have to rebuild it again.

Look for tiny flecks in the bubble nest after mating. If the flecks increase over time, young Bettas are on their way.

What Is a Bubble Nest?

Bubbling is used to make a nest for raising youngsters. Because bettas live in sluggish-moving lakes with limited oxygen levels, these bubble nests provide increased oxygen to the young during development.

Should I Remove a Betta Bubble Nest

Should I Remove a Betta Bubble Nest?

Remove it only if you do not want baby bettas.. The nest is essential for the eggs and fry to develop. If you're not ready to breed your bettas and you removed their nest as part of your routine tank maintenance, don't be concerned. Your male betta will build another one.

How Many Eggs Does a Female Betta Fish Lay?

They can produce a wide range of numbers, from as little as 20 to as many as 500. The female should be removed from the breeding tank after this activity is finished because the male will fiercely protect the eggs, including against her own mother.

Betta Eggs

The male betta will gather the eggs and deliver them to the bubble nest, where he will fertilize them. He will look after the eggs for the next three days, keeping them safe and replenishing any that fall from the nest. Male betta may also consume any unhatched or non-developing eggs. The eggs will be milky white and somewhat unevenly rounded. Dark flecks will appear on the eggs during fertilization.

Can Female Betta Fish Lay Eggs Without a Male?

Yes. However, the eggs will be reabsorbed in most cases. There may be unfertilized eggs that she expels, which will end up at the bottom of the aquarium.

If she doesn't absorb them, she may become egg-bound. An egg-bound female is one who has not released unfertilized eggs. This condition can lead to infection and it may be treated by feeding her a healthy diet and placing her next to a male so she releases the eggs.

Betta Fry Care and Feeding

They stick around for 24 hours to soak up their yolk sacs. They then hang out with the bubble nest for 36 hours to take advantage of the oxygen.

The female lays her eggs, and the male takes care of them. Occasionally, some of the eggs may fall from the nest, and the male will go retrieve them. After three days, the fry will appear. The fry will be free swimming in three to four days. Remove the male from the breeding tank at this point since he may eat the fry.

Begin feeding the fry tiny foods like infusoria, small brine shrimp, vinegar eels, and microworms.

How Many Betta Fry Will Survive?

Betta fry are robust, and if properly cared for, you can expect upwards of 90% of them to survive.

What Age Do Betta Fry Get Color?

At eight weeks, betta fry will become colored.

Keep the fry in the breeding tank for three to four weeks before moving them to a grow-out tank. In three to four months, the fry will be fully grown fish.

How Long Is the Mating of Betta Fish?

It generally takes between a few minutes and several hours. The majority of betta's lay approximately 30-40 eggs in each cluster, with some producing up to 500. The male Bettas will gather all the eggs and place them in the nest.

How Do Betta Fish Reproduce?

Bettas, like other fish, reproduce in the same way. The female first expels her eggs, and then the male swims over to them and sprays sperm on them in order to fertilize them. To be more specific, when it comes to betta fish, the male will wrap himself around the female and squeeze the eggs out of her. The male betta fish will look after the eggs and nest until the fry hatch.

How Long Does It Take a Betta Fish to Give Birth?

In three to four days, the young betta fish will hatch. Male betta will stay in the bubble nest and collect any eggs that fall out as the babies hatch. When they first emerge, the youngsters, known as "fry," are quite small. The parents won't care for them; instead, they'll search for their own food as they grow.

How Long Does Fish Eggs Take to Hatch?

In most situations, your fish's eggs should hatch in 3-7 days, however they can sometimes take 2 days to a week or more. The incubation period varies depending on species, tank conditions, and water temperature, but it won't exceed 10 days for most fish species.

How Long Do Betta Fry Take to Grow?

The Betta's eggs are tiny, measuring only 0.03 inches in diameter and reaching a length of 1.9 inches after 11 weeks. The fins of the Betta reach their maximum development by the age of seven months, when its length ranges from 3 to 4 inches.

What Do You Feed Baby Betta Fish?

When feeding baby bettas, use small pellet or finely crushed flake food.

Pregnant Betta Fish Care

Pregnant Betta Fish Care:

A female betta fish cannot get pregnant. However, they do become "eggy." This is quite typical and a good sign that she is in good condition, both physically and sexually.

It's possible that she'll suddenly become less eggy/bloated as her body gets rid of the discarded eggs with time. This is typical in the tank, but it doesn't always occur.

Although there are many distinct variations of bettas, no two are exactly alike in terms of mannerism/behavior, appearance, or sexual proclivity.

Additionally, if she is eggy, do not assume she must breed. The same can be said for males that construct bubble nests. It just implies that they are maturing sexually or the tank environment is acceptable to breed in, or perhaps another betta, generally a male, is visible.

There's a lot of effort, time, and energy necessary in order to groom and prepare the male and female for breeding, with the possibility that it won't work.

It's possible that no two males or females will breed with each other, or that they will refuse to mate with any male or female you offer them. This is something to be aware of so you don't wind up with one or two dead fish.

Final Thoughts:

As you can see, the betta fish's mating ritual is fascinating, and there may be a lot of back and forth as hopeful breeding pairs try to accept one another.

If a female betta without a mate produces too many eggs, she will drop them. Her eggs will become unfertilized while she develops additional eggs for when an interested male is discovered. In the presence of male betta, Eggs are fertilized by the male.

When a female betta is ready to mate, generally she will be carrying eggs in her ovipositor for 1 or 2 days before releasing them. The eggs are fertilized as they sit in the bubble nest for between 24 and 36 hours. The female may lay a new batch of eggs every 48 to 72 hours, or until mating is finished, in their natural environment, depending on water conditions.

After mating, the male and female bettas should be kept separated in a breeding tank until the fry have hatched.

You may want to remove the male after the eggs have hatched so that there are no dangers to the betta fry, but they can grow large enough to survive on their own.

Sarah Robertson


I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

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