Are Molly Schooling Fish? (9 Compatible Mollies Tank Mates)

Fishkeeping is an accessible and fun hobby to dive into, and it’s easy to find plenty of resources. One topic that often comes up in fishkeeping forums is the question: “Are molly schooling fish?”

Do mollies school? While Mollies have the instinct – if bred responsibly – to form schools in the wild, many people are curious about which compatible tank mates make suitable candidates for school formation within a home aquarium setting.

In this blog post, we’ll provide you with proven lists of 9 Mollies Tank Mates.

breeding molly fish

So that you can be sure they’re swimming alongside optimal playmates who will contribute positively towards their overall well-being! Keep reading to learn more!

Are Molly Schooling Fish?

Do mollies need to be in groups? The answer is yes! Mollies are schooling fish, meaning they feel more secure when kept in groups and actively seek companionship with other mollies.

The social, schooling nature of the fish means they require companionship to thrive and feel secure.

Therefore, it is strongly advised that at least four individuals live together to promote a stress-free environment for your new aquatic friends!

In addition to requiring companionship, they need plenty of space to move around and create their small schools.

This means it’s essential to select tankmates that require the same size and water quality parameters.

Why Do People Assume Molly Fish Is Schooling Fish?

Are mollies community fish? Mollies are the most popular type of schooling fish, and many assume they must be kept in groups due to their ability to adapt to a wide variety of community tank setups.

How many fish in a 10 gal tank

Additionally, mollies will naturally form schools near food sources when living in the wild as part of their instinctive behavior.

Are mollies schooling fish? Yes, this means that keeping Mollies in groups can be incredibly beneficial for their welfare, as it will likely encourage them to interact with each other more often.

molly fish compatibility chart

Choosing the suitable tank mates for your mollyfish is crucial for their happiness and well-being. Here’s a breakdown of Molly’s compatibility:

Generally Compatible:

  • Other Livebearers: Guppies, swordtails, platies, and Endler’s livebearers are all excellent tank mates for mollies. They share similar water requirements, temperament, and breeding habits.
  • Small Schooling Fish: Neon tetras, cardinal tetras, white cloud mountain minnows, and harlequin rasboras are peaceful and add vibrant color to the tank.
  • Catfish: Corydoras catfish and Otocinclus catfish are excellent bottom-dwellers who help clean the tank and don’t bother mollies.
  • Snails: Mystery and nerite snails are peaceful scavengers that help keep the tank clean.

Potentially Incompatible:

  • Larger Cichlids: Oscars, angelfish, and other large cichlids can be aggressive towards mollies, especially males.
  • Barbs: Some barbs, like tiger barbs, can be nippy and finicky with mollies.
  • Bettas: While female bettas can sometimes be okay with mollies, male bettas are known for their aggression and can attack them.
  • Goldfish: Goldfish have different water requirements than mollies and can be aggressive fin nippers.

Tips for Successful Compatibility:

  • Provide ample space: Mollies need a tank with at least 20 gallons per pair. A larger tank will help reduce aggression and provide more territory for all fish.
  • Maintain good water quality: Regular water changes and proper filtration are essential for the health and well-being of all fish.
  • Introduce fish gradually: Adding new fish slowly allows the existing community to adjust and reduces stress.
  • Monitor your fish: Keep an eye on your fish for any signs of aggression or fin nipping and take action if necessary.

How Many Mollies Should You Keep Together?

How many molly fish should I get? For keeping fish together, a ratio of male and female mollies, at least two to three females for every male molly fish, is recommended.

This will help ensure the fish are happy and healthy by avoiding aggression among male mollies competing for female attention.

The number of fish you can keep in one tank depends on its size; smaller tanks may only be able to support up to five or six fish together.

It’s also important to note that mollies prefer a larger group and thrive best when they have plenty of space, so if your tank is big enough, consider adding more than three females per male.

Lastly, make sure to perform regular water changes, as these fish species can be pretty messy with their waste!

How Much Are Mollies?

Molly Fish for Sale Prices range from $2 to USD 10, depending on the size and age of the fish.

However, prices can vary widely depending on where you buy them. Online stores often offer more variety, while local pet fish stores have fewer short-finned molly species options.

Mollies are schooling fish that naturally require companionship – however, it’s essential to ensure you keep your tank manageable.

Can I Only Have One Molly Fish?

Do mollies like to live alone? Not! Mollies, also known as Poecilia sphenops, are social freshwater fish that live in large groups and prefer the company of their kind.

Keeping mollies alone can be highly detrimental to their mental health and well-being. Studies have shown that when isolated from other fishes, they display signs of stress, including reduced appetite and aggression toward other specimens.

Additionally, having multiple specimens of the same species allows them to explore different roles within the group, such as territorial behavior or dominance among males.

As a result, keeping at least three fish together in one tank is strongly recommended for optimal health outcomes.

Can Mollies Live with Other Fish?

Are mollies a schooling fish? The answer is yes; generally, mollies are peaceful fish and can be housed with various other tank mates.

Mollies fish can cohabit peacefully with other community fish, provided they are of similar size and the environmental conditions fit their needs. Predatory behavior should be avoided at all costs.

Do Molly Fish Need Tank Mates? However, selecting species that require the same water parameters and size as your fish is essential. 

Some suitable tankmates for mollies include tetras, guppies, betta fishplaties, and other livebearers.

It’s also important to remember that mollies schooling fish can become territorial, so it is best to introduce all fish simultaneously and pay close attention to social interactions within the tank.

Following these tips can create a friendly and thriving environment for your fish and other tankmates.

Keeping mollies in groups is highly beneficial for their health and welfare. You can ensure that your fish stay healthy and happy by providing them with plenty of space, a suitable tank mate selection, and regular water changes.

What fish compatible with mollies?

What fish can you put with mollies? Fortunately, there are many compatible molly tank mates to choose from. Here is a list of 9 tank mates for mollies that are sure to make great additions to your tank:

TOP 9 Compatible Mollies Tank Mates That Make Ideal Schooling Fish:

  • Guppy
  • Platy
  • Tetra
  • ·Zebrafish
  • Green Swordtail
  • Cory Catfish
  • Danios
  • Loaches
  • Barbs

Are Molly Fish Easy to Care For?

Mollies are excellent for aquariums as they require little care and can thrive alongside other fish.

Their vivid colors, personalities, and overall diversity makes them an attractive addition to any tank that needs more excitement. Don’t hesitate to add mollies – their beauty will never go unnoticed!

It is crucial to maintain the water parameters within their ideal range. To keep them healthy and happThe perfect temperature for mollies is between 72-78°F (22-26°C), and a pH of between 7.0 and 8.5 is ideal.

How to Care for Molly Fish?

If you’re like most people, you don’t have much experience caring for fish. 

Fish can be a great addition to any home but require much care and attention. If you’re not careful, you could quickly kill your fish.

With this video, you’ll learn everything you need to know about How to Care for Molly Fish?

In just a few minutes, you’ll know how to set up your tank, choose the right food and water conditions, and identify and treat common illnesses.

You’ll also learn simple tips and tricks to keep your fish healthy and happy so they can make a great addition to any home aquarium!

Once you’ve learned the basics, you’ll be ready to set up your tank and start caring for mollies.

Adult Size & Mollies Fish Lifespan:

Molly fish size chart can vary due to different species – the common molly and sailfin molly fish are usually around 3-4 inches (7.6-10 cm) in adulthood.

Regarding lifespan, mollies can live up to 5-7 years with proper care and maintenance. With a healthy diet and stress-free environment, molly fish can live to their full potential for many years.

The key to having happy and healthy fish is providing an aquarium with ample room to swim and lots of hiding spots, an appropriate water temperature, a healthy diet, and regular maintenance.

Also, adding some live plants in the aquarium can help your fish feel more at home and provide them with extra oxygen to breathe.

Molly Fish Aquarium Size:

The aquarium size for mollies should have a minimum of 10 gallons (37.8 liters) and can hold up to 30 gallons (113 liters).

Mollies need plenty of room to swim, so the bigger the tank, the better. A larger tank also allows you to add more water volume, which helps keep the water parameters stable and also gives mollies more space to explore.

The aquarium should also be equipped with plenty of hiding spots, such as plants, caves, and other decorations for the mollies to feel safe.

On top of that, a good filter system is essential for keeping the tank clean and free from harmful toxins.

Molly Fish Tank Requirements & Caring Tips

Mollies require specific care and tank requirements to stay healthy.

A good rule of thumb is to have 1 gallon (3.7 liters) of water for every 1 inch (2.5 cm) of fish, so a 10-gallon (37.8 liters) tank should have no more than ten mollies.

The water should be kept between 72-78°F (22-26°C) and have a pH of 7.0-8.5. It’s essential to keep up with regular water changes, as mollies are sensitive to water quality and concentration of toxins.

The tank should also have a good filtration system, plenty of hiding places, and some live plants for oxygenation.

A good diet is also essential; mollies can be fed flakes, pellets, or frozen food such as bloodworms and brine shrimp.

Water Parameters for Mollies:

Maintaining the water parameters within the ideal range for mollies is crucial. The ideal Mollies Water Temp is between 72-78°F (22-26°C), and a pH of 7.0-8.5 is perfect.

Ammonia and nitrite levels should remain at 0 ppm, while nitrate levels should remain at or below 20 ppm. These parameters should be tested regularly with a quality test kit.

If the Molly Ph Level or temperature is off, it can cause stress to your fish and lead to health issues. It is also important to do water changes regularly as this helps keep the tank clean and free from toxins that co-accumulate over time.

Finally, be sure to monitor your fish for signs of illness. Some common diseases in mollies are Ich, velvet, and fin rot which can easily be treated with medication.

With proper care and maintenance, you can ensure that your fish remain healthy and happy for years to come!

Molly Fish Tank Setup:

Many people are interested in breeding fish for profit but need to know where to start. 

When setting up a molly breeding tank, it’s essential to consider factors such as water temperatures, pH levels, and the amount of space in the tank.

It is best to start with a 10-gallon (37.8 liters) tank as mollies need plenty of room to swim, and it also allows you to add more water volume, which helps keep the water conditions stable.

Setting up a fish tank can be difficult, especially if you’re trying to do it independently.

There are many things to consider, from the size of the tank to the type of fish you want to breed.

This video will show you how to set up a molly breeding tank. We’ll walk you through each step, from choosing the right tank and equipment to adding water and plants.

By following our tips, you’ll be able to create a healthy environment for your pet fish that will help them thrive and produce healthy offspring.

Molly Fish Food & Diet:

Mollies are omnivores and do well on a variety of foods. They enjoy plant-based food, such as algae wafers and spirulina flakes, and meat-based foods, like frozen brine shrimp and bloodworms.

It’s essential to provide a balanced diet by offering a variety of foods. It’s best to alternate between plant and meat-based foods. To ensure your mollies get all the nutrition they need, 

It’s also important to feed your mollies high-quality food designed for their needs. Many of these foods are fortified with vitamins and minerals that help keep your fish healthy and provide them with all the nutrients they need.

Finally, it’s essential to feed your fish in small amounts several times a day. Overfeeding can create an excess of uneaten food, which will pollute the tank and cause health issues for your fish.

By following these guidelines, you can provide them with the nutrition they need to stay healthy and happy.

Common Types of Mollies

Sailfin Mollies:

The sailfin molly is one of the most popular types of molly fish. They are known for striking coloration, with a black and white body and a large dorsal fin.

Balloon Molly Fish:

Balloon mollies are an exciting variety that has been selectively bred over the years. They have a rounder body shape than other mollies, and their fins tend to be longer.

Gold Doubloon Molly:

The gold doubloon molly is another popular type of molly. They have a golden coloration with black spots and a long, sail-like dorsal fin.

Black Molly Fish:

Black mollies are a fantastic variety that has a deep black coloration. They are known for their hardiness and easy-going nature.

Dalmatian Molly Fish:

Dalmation Mollies: The dalmatian molly is a striking fish with a black and white spotted pattern. It is one of the most popular mollies because of its unique color.

Yellow Molly Fish:

The yellow molly is a bright and colorful variety with intense yellow coloration. They are known for their easy-going nature and hardiness.

By understanding the different types of mollies and their specific needs, you can create the right environment to breed this shoaling fish successfully. With the proper care and attention, you can enjoy watching your fish breed and fill your tank with healthy offspring.

Molly Fish Breeding:

Mollies are one of the easiest fish to breed, making them a great choice for novice aquarists.

However, it’s important to understand how mollies reproduce so you can create the right conditions for successful breeding.

Mollies can start breeding as early as four months old and usually spawn in groups of 3-15 fish.

Keeping the tank clean and providing plenty of hiding places is essential. To encourage your mollies to breed

You should also lower the water temperature slightly and increase the food you feed them.

How Long Are Molly Fish Pregnant For?

Mollies are usually pregnant for 24-48 days, but Molly fish gestation period can vary depending on the temperature of the water.

Caring for a Pregnant Molly Fish: The ideal water temperature for breeding mollies is around 80°F, and the warmer the water, the shorter their gestation period.

Once they are ready to give birth, the female molly fish will release a few dozen baby fish into the water.

The fry is tiny and requires specialized care, so it’s essential to be prepared for their arrival.

It’s also a good idea to separate the pregnant female from other schooling fish in the tank.

This will help ensure the fry are safe and have enough food to survive when they are born.

Do Molly Fish Eat Their Babies?

Molly fish babies are usually safe from their parents, but it’s still possible for them to become a meal. It’s essential to provide plenty of hiding places and food for them. To ensure the fry are safe, 

It would be best if you also fed the adult mollies regularly so they won’t be tempted to eat their young. By following these tips, you can help protect the fry and ensure they grow up healthy and strong.

Common Possible Mollies Fish Diseases:

Mollies can be affected by various diseases, including bacterial infections, parasites, and viral infections.

It’s essential to keep a close eye on your fish and look out for any signs of illness. Common symptoms include loss of appetite, discolored fins, or spots on their bodies.

You must immediately consult a veterinarian for proper diagnosis and treatment if you notice any of these symptoms.

Following the proper steps, you can create the perfect environment to breed molly fish and enjoy watching them grow and thrive in your tank. With appropriate care and attention, you can ensure your mollies stay healthy and live long lives.

Remember to keep the water conditions optimal for breeding and provide plenty of food and hiding places for both the adults and the fry. You can enjoy watching your fish grow strong and healthy with careful monitoring and regular maintenance.

Mollies Fish Diseases list:

  • Swim bladder disorders
  • Dropsy (Kidney failure)
  • White spot disease (Ichthyophthirius)
  • Fin rot.
  • Malnutrition
  • Ammonia poisoning
  • Nitrate poisoning.
  • Stress.
  • Unexplained death.

Taking good care of your mollies can help them stay healthy and live a long life, but it’s essential to watch out for any signs of disease or illness so you.


So, are molly schooling fish? Molly schooling fish are great for tank owners because they help to keep the tank clean. They also add a lot of color and personality to the tank. All fish keepers should consider adding a school of mollies to their aquariums! What do you think?

We hope this blog post has answered your questions about molly schooling fish and has given you valuable insight into the different tank mates they require. Be sure to research before stocking your aquarium, as the proper selection of compatible molly fish tank mates will ensure a balanced ecosystem that everyone in your home can enjoy! Good luck!

You might also like

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.

Recent Posts

Stay Updated

Get outdoor trends, data, new products, and tips delivered to your inbox.

error: Content is protected !!
Scroll to Top