Can Mollies Live with Bettas? A Complete (Beginner’s Guide)

Are you thinking of introducing mollies to your betta fish tank? But can mollies live with bettas in the same fish tank peacefully?

Mollies, along with shrimp and some snails, can make an excellent addition to any community fish tank – but they must be kept alongside the right companions.

Many fish keepers want to keep a betta fish and a molly in their tank, but they need to figure out if it’s possible or how to do it.

Many people think bettas and mollies can’t live together because they’ve heard that Mollies are big and aggressive fish that will eat the betta.

This isn’t true! With enough space in a 30-gallon tank, you can easily keep a betta and a male molly together.

pregnant molly fish

In this complete beginner’s guide to keeping mollies with bettas, we will review all the considerations needed for peaceful coexistence between these two popular aquarium fish species.

Learn about the different types of molly, size ratio requirements you should adhere to when setting up the tank, diet restrictions, and much more!

Can Mollies Live with Bettas in the Same Tank?

Can molly fish live with betta? Mollies and bettas can live peacefully in the same aquarium if kept in the right conditions. However, you should know a few things before introducing these two species together.

While they may not be best suited for small tanks, female mollies and bettas can coexist peacefully in a large tank with plenty of swimming space and hiding places.

Mollies are best suited for large tanks, with a minimum size of 30 gallons recommended. Bettas typically require at least a 5-gallon tank, but the bigger, the better.

Once your female mollies have reached their full reproductive potential, you can rest assured that more baby fish won’t be invading the aquarium. This ensures a stable population size – no dramatic increases or decreases!

When setting up the tank for both species, it’s important to remember that mollies are relatively large compared to bettas, so you’ll want to ensure plenty of space in the tank.

Will Betta Fish Kill Mollies?

No, Bettas will not kill mollies if kept in the right conditions. However, it’s important to remember that bettas are territorial and may become aggressive if they feel threatened in any way.

It’s important to provide plenty of hiding places and decorations in the tank so bettas and mollies can have their territory and areas to retreat.

Additionally, you should research the types of molly fish you’re considering for your aquarium and make sure they are compatible with your betta. Some mollies are more aggressive than others and may not be suitable for a community tank.

Remember to provide plenty of swimming space and food for both species and regular water changes to keep the tank clean.

Do Bettas and Mollies Make Good Tankmates?

Can You Put a Betta with a Molly? Yes, bettas and mollies can make good tankmates if kept in the right conditions.

When set up properly, with plenty of space and hiding places, bettas and mollies can live peacefully together.

Mollies may seem like an ideal tankmate for bettas, as they are generally peaceful and strong.

However, You should take caution before introducing these two species to the same environment – some potential problems could arise.

For example, mollies may compete with bettas for food or territory. Additionally, in the wild, male mollies have been known to show aggression towards betta males. For this reason, it is best only to introduce one male of each species into the tank to avoid overcrowding.

In addition to a good aquarium setup, keeping mollies with bettas requires routine maintenance and frequent water changes to ensure the tank is clean and healthy for both species.

When done properly, you can have a peaceful and rewarding aquarium with bettas and mollies living happily together.

Can Mollies Live with Female Bettas?

Introducing female betta fish to a tank of mollies is often easier than attempting the same with males.

Despite their naturally aggressive behavior, females are notably less combative than males; however, if you’re aiming for a ‘betta sorority,’ think bigger in terms of your aquarium size! Bettas and mollies should still have plenty of their own space, as well as a few hiding places.

Molly fish pregnancy

With a lifespan typically ranging from 1-2 years, mollie fish can offer an exciting yet short-lived addition to any aquarium.

But their time in the tank is not without consequence – they are live-bearing fish and require special consideration regarding population numbers within your aquatic habitat!

When choosing the right molly, it’s important to research the type of fish you’re considering. Some species can be more aggressive than others and may not be suitable for a community tank.

Can Male Betta Fish Live with Mollies?

Bettas and mollies make a great combination for your fish aquarium, as they have complementary diets.

With the right focus on meat-based nutrition for bettas, their omnivorous partners will provide them with all the fibers needed to thrive!

Male betta with mollies can be successful in the right conditions. When introducing male bettas to a tank of mollies, it’s important to remember that bettas are naturally territorial and may become aggressive if they feel threatened.

For this reason, it’s best to introduce only one male betta into a tank with mollies and provide plenty of covers, hiding places, and decorations so each species can have its territory.

Can Black Mollies Live with Betta Fish?

Yes, black mollies can live with betta fish in the right conditions. Black mollies are generally peaceful fish and strong enough to coexist with bettas in the same tank.

Are you keeping your betta and other fish in the same tank? You can make it work! Adding a little aquarium salt to their environment will create brackish conditions, allowing both species to thrive.

However, caution should be taken before adding these two species to the same environment – some potential issues could arise. For example, mollies may compete with bettas for live food or territory.

Can Mollies and Bettas Breed?

Two very different types of fish, a betta, and a Mollie, could find common ground in romance.

Alas, it would be impossible for this fairytale ending to come true: due to their disparate species status, these lovebirds cannot conceive offspring together.

However, it is possible for two bettas to breed and produce their own offspring. Due to the complex nature of breeding bettas, it is best to do extensive research before taking the plunge.

In summary, while betta and mollies can coexist peacefully in the same aquarium, they cannot breed together. A good setup and routine tank maintenance are essential to ensure the best environment for both species.

You can have a beautiful and rewarding aquarium with bettas and mollies happily living together with the right care.

Can Mollies Eat Betta Food?

Mollies are omnivores that greatly benefit from being fed various foods, and betta food is no exception.

Nutrition-packed with exciting new flavors for these fish to experience, it can be easily added into the tank’s diet plan as part of their regular meals.

However, betta food is not a substitute for their primary food source – it should only be offered as an occasional treat or snack.

Can Platies Live with Bettas?

Yes, platies can live with bettas in the right conditions. Since both fish have similar requirements for diet and water parameters, they make a great combination for your betta tank.

However, it’s important to remember that platies can be more aggressive than bettas, so they should not be kept in a tank with more than one male betta.

Additionally, platies can be territorial and compete with bettas for food or territory. To ensure a stress-free environment, provide hiding spots and decorations to break up the sight lines of your fish.

What Fish Can Live with Bettas?

In addition to mollies and platies, guppies, swordtails, neon tetras, and other small peaceful schooling fish are suitable betta tank mates.

It’s important to remember that these fish should only be kept in a larger tank with one male betta, as they can become aggressive and territorial.

Additionally, all the fish in the tank should have adequate hiding spots, live plants, and decorations to break up sight lines and provide each species with its territory.

Finally, it’s important to remember that great tank mates should have similar dietary and water requirements to ensure a comfortable environment for your fish.

What Fish Cannot Live with Bettas?

Due to bettas’ territorial nature and sensitivity to water parameters, it’s important to avoid tank mates that are too large, aggressive, or have different dietary or water requirements.

Examples of fish that should not be kept with bettas include cichlids, goldfish, sailfin mollies, Gouramis, Tiger barbs, Puffers, damselfish, Angelfish, and Red tail sharks.

It’s also important to avoid keeping two or more male bettas in the same tank, as they will become aggressive with each other.

In conclusion, by researching any potential tank mates’ dietary and water requirements, you can ensure that your betta has a comfortable and safe environment.

How Many Mollies Can I Put in a 10 Gallon Tank with a Betta?

When considering good tank mates for a betta, it’s important to keep the size of the aquarium in mind. Generally speaking, 1-2 mollies can comfortably live in a 10-gallon tank with a betta.

With the correct aquarium setup, you’ll be able to keep various fish in your tank. Remember that for every gallon of water, there should usually only be one inch of fish – so 3-inch mollies mean no more than three per 10-gallon system!

It’s possible to comfortably house four mollies in a 10-gallon tank, even if the fish are only inches long.

What Fish Can Be Paired with Mollies?

Mollies are social fish that do well in community tanks with other peaceful species. The South American Dwarf Cichlid is an ideal addition to many community aquariums with its peaceful nature and compatibility.

These fish have been proven to collaborate well with other species, including Cory Catfish, Danios, Tetras, Loaches and Barbs, or even Livebearers – provided they all inhabit similar environmental conditions of near-equal size.

They can also be kept with bettas as long as only one male betta is in the tank. It’s important to remember that common mollies can be aggressive toward other fish with similar body shapes. Hence, it’s important to provide adequate hiding spots and decorations to break up sight lines.

Can Male Betta Fish Live with Guppies?

Can guppies live with bettas? Keeping guppies in the same tank as bettas may be possible, though one should exercise caution due to their temperament.

Bettas are often referred to by another name – “Siamese Fighting Fish” – which speaks volumes about their aggressive nature towards other popular freshwater fish species.

Guppies, on the other hand, are active fish and can easily become intimidated or stressed in the presence of a territorial betta.

It’s important to remember that guppies are schooling fish, so keeping at least 3-4 of them in the same tank is best.

This will help to distract the betta from attacking any individual and provide a sense of security for the guppies.

Ideally, the tank should be at least 20 gallons to accommodate both species, and there should be plenty of hiding spots, plants, and decorations to break up sight lines. Additionally, be sure that the water conditions are suitable for both species.


So, Can mollies live with bettas? Peaceful coexistence between these two species is possible, but it requires a bit of planning and effort on your part to ensure that everyone has what they need to thrive. When setting up your tank, be sure to provide plenty of hiding places and plant life for the mollies and some open areas for the bettas to patrol. In addition, regular water changes are essential to keeping the ammonia levels low – which can lead to aggression in both fish. With a little time and care, you can create a beautiful fish aquarium that peacefully houses mollies and bettas.

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About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

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