How Betta fish mate?

How Betta fish mate?

betta mating

Betta fish, also sometimes known as the Siamese fighting fish, is well-known for their aggressive nature and their tendency to defend their territory.

However, betta fish have a really interesting mating phenomenon.

When a male betta fish meets a female betta fish, they begin by doing what appears to be their natural habit- fighting.

male betta fish

After a while, when the male betta fish knows that the female betta fish has eggs, the fighting will eventually stop.

female betta fish ready to mate

Both fish will come close and swim around each other, and occasionally they will show signs of shivering.

After brushing against each other and staying intimately close, the male betta fish will twist its body and wrap around the female fish, as if it wants to engulf the female fish. In fact, in this step, the male betta fish is trying to squeeze the female fish and at the same time, the male betta fish is trying to extract her eggs and fertilize them.

How does the egg look like?

Upon fertilizing, the female betta fish will release some white tiny eggs, which resemble the color and size of salt grains. The eggs will gradually fall from the female fish to the bottom of the tank, moving slowly down the water.

betta brooding


How long does mating take for betta fish?

Betta fish mating duration will vary from a few minutes to a few hours. It can be due to a lot of factors such as water temperature, surrounding etc.

How many eggs does female betta fish release? After mating, a female betta fish will typically release 30 to 40 eggs. However, some can lay up to 500 eggs.

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What will the male and female betta fish do after mating?

After successful mating, the female fish will leave, or usually be removed from the tank.

On the other hand, the male betta fish will retrieve the eggs with its mouth and place them in a safe nest of bubbles, which it has created with its saliva before mating.

betta fish bubble nest

As long as the eggs have not hatched, the male fish will act as a protector of the eggs and it will guard the offspring from threats and other fish.

After approximately 50 hours, the eggs will hatch and offspring is successfully reproduced.

How does male betta fish form the bubble nest?

betta fish bubble nest

Male betta fish will form an egg nest using its saliva before mating with female betta fish. This is to ensure the safety and successful hatchery of the eggs.

The bubble nest will float on the surface of the water and this will keep the eggs off the bottom of the tank, to minimize chances of threats and dangers.

Also, male betta fish has a chemical in his saliva which can help the eggs to hatch and release the baby fish from the eggs.

Since betta fish are aggressive and hostile, why wouldn’t they fight with each other and kill each other during mating?

In advanced of the mating, male and female betta fish will have some light physical fight with each other. However, as evolutionary purpose suggests, they will soon notice that they are both ready to reproduce, and they will come to a halt.

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The male fish will notice that the female fish is carrying eggs, and they will start to engage in mating behavior.

This is to ensure that their species can be reproduced successfully. However, after mating, male and female fish shall be separated. The male fish shall be separated from the baby fish as well after hatchery.

Why should the male and female betta fish be separated after mating?

This is because the male betta fish will resume to its aggressive nature, and will fight with the female fish to defend its territory, although they have just mated. In the case when they are not separated, a weak female betta fish will be killed by the male betta fish in the fight.

Why should the male betta fish be separated from the babies after hatchery?

betta fish fry

As mentioned, the innate aggressive nature in male betta fish will drive it to confront the baby fish. Baby fish will eventually grow bigger, and the male betta fish will view this as a threat to its life and territory. Therefore, the male betta fish will fight the baby fish, or even eat the baby fish away.

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