18 Popular Molly Fish Tank Mates You Should Know

molly fish tank mate

A molly fish tank mate can be any type of fish that you wish to keep with your mollies, and the most popular molly tank mates are listed below. However, there are other types of fish that make good molly tank mates too, so don’t think that this list is all-inclusive!

Mollies make excellent aquarium fish, and are an easy-to-care-for option for both beginner and expert aquarists alike. However, one of the big questions that arise when it comes to keeping mollies in your tank revolves around the different species of mollies, and whether or not they can be kept with other fish in your aquarium.

The answer to this question may be a little bit more complicated than you’d think, but there are plenty of fish that work as great molly tank mates!

Have you ever asked yourself, What kinds of fish can live with my molly in the same tank? Your molly fish can’t be alone all the time, right? The good news is that there are plenty of other fish out there that make great tank mates with your molly!

Not only are these fish compatible with your molly, but they also happen to be very pretty and have fun personalities! Here are 18 popular molly fish tank mates you should know about.

Popular molly fish tank mates

Guppy Fish (Poecilia reticulata)

molly fish tank mate

Guppy fish are one of the most popular and easily recognizable aquarium fish. They are both brackish and freshwater species that thrive in most water conditions and typically reach two inches long. Guppy fish live in groups that consist of one male and multiple females.

While they can be housed together with other types of fish, guppies will often bully other species for food or territory. These social creatures prefer to be kept in groups of ten or more, although the number can vary depending on tank size. With its striking blue coloration, this fish is an excellent candidate for those who want a colorful display.

The best way to introduce them into your aquarium is by adding them at the same time as your established community so they have something to eat immediately after release. Feed them regularly with flake food and make sure their tank has plenty of plants and hiding spaces so they feel safe from predators.

Endlers (Poecilia wingei)

molly fish tank mate

Endlers are a small, colorful fish that can grow up to 2 inches in length. They have a lifespan of around 3-5 years and are fairly easy to take care of. Endlers are omnivores, meaning they eat both animal and plant matter; they like to eat algae wafers as well as freeze-dried bloodworms or brine shrimp.

The best part about endlers is that they breed quickly, so you can create your own little colony with just one pair. The downside is that the fry (babies) need to be separated from the adults because they’re not self-sufficient enough yet.

Platys (Xiphophorus)

molly fish tank mate

There are many different types of molly fish tank mates that can be kept in a molly tank, but one of the most popular choices is the platy. These live-bearing fish are very hardy, fast-growing, and can adapt to a wide variety of water conditions. They are also very inexpensive and readily available at most pet stores.

Sailfin Molly Fish (Poecilia latipinna)

Platys make excellent beginner fish for new aquarium owners because they are hardy and easy to care for. When shopping for them you may want to look for one that has an even coloring and clear eyes. If you’re not sure what type of platy to get then look for the ones with a black stripe on their sides as these are the easiest ones to find.

Danios (Cyprinidae)

molly fish tank mate

Danios are small, schooling fish that are often kept with larger, more aggressive tank mates. They do best in groups of six or more and should be added to the tank at the same time. If a tank is set up for one species only, danios can be added to a school of guppies or tetras (who will not eat them).

They enjoy spending their time swimming near the surface of the water where they can feed on insects such as mosquitoes and other air-borne pests. They also make good additions to tanks with goldfish and koi because of their ability to survive temperatures greater than 72 degrees Fahrenheit. A good example of this group is Zebra Danio (Check below).

Tetras (Characiformes)

molly fish tank mate

The Tetra fish is one of the most popular aquarium fish in the world and also one of the easiest to care for. They come from environments with lots of surface water, so they do best in tanks that are at least 20 gallons and have a filter. Tetras are schooling fish, so it’s best to buy at least three or five when you buy them to make sure they have someone their own age to hang out with.

They’re not very aggressive, but they can be territorial so you’ll need to watch out if you add new tank mates. Like other species, these guys love eating mosquito larvae so consider getting some food that has vitamin A added (like beef liver) if your tank is large enough.

Angelfish (Pterophyllum altum)

molly fish tank mate

The angelfish, also known as the angelfish or Pterophyllum altum, is a freshwater fish native to the Amazon Basin. It is an omnivore and feeds on both plants and small animals like insects, worms, crustaceans, amphibians, and fish eggs.

Their coloration can vary from light blue with orange-yellow markings to yellow with darker blue spots. When they are in a group they can be territorial and aggressive towards other fish but when alone they are usually quite docile.


molly fish tank mate

While minnows are a common fish tank mate, they are not the best. They lack the personality of other fish and often die. Minnows can still be kept in a tank with other fish but they should always be added last to avoid stressing out your more fragile fish. It is also recommended that you have at least five gallons for every one-inch long minnow.

In addition, if you keep them in a school they will be less likely to bother your other fish and feel more comfortable. Guppies: Like minnows, guppies are not the best choice when looking for an interesting fish tank mate. The only difference between them is that guppies can live longer than minnows.

Dalmatian Lyretail Molly (Poecilia latipinna)

Zebra Danio (Danio rerio)

molly fish tank mate

This nocturnal fish is one of the most common types of molly on the market. They are fairly hardy and can take a variety of water conditions. Zebra danios are also schooling fish, so they like to be in groups in their tank. They have a white stripe running down their body and come in many different colors such as black, blue, yellow, or orange.

The zebra danio needs at least 10 gallons per fish because they need more room than other small fishes. If you keep them with more aggressive types of fish, it may become too crowded for them and make them sick. These little guys only grow up to 2 inches long!

Harlequin Rasbora (Trigonostigma heteromorpha)

molly fish tank mate

These fish are ideal for beginners since they are hardy and tolerate a variety of water conditions. They also come in a variety of colors, so you can choose the one that fits your tank best.

Another interesting fact about Harlequin Rasboras is that females are larger than males and tend to be more brightly colored. A final benefit of these fish is their relatively slow growth rate, which makes them an ideal beginner’s pet!


molly fish tank mate

A popular tank mate for the molly is the Pleco. The Pleco is a great choice because it will eat any leftover food that you put in your tank, which saves you from having to feed as much to your other fish. It also has a very small mouth, so it won’t take as much of the food as other fish.

The downside to this fish though is that they grow up to be pretty large and it takes a long time before they start eating on their own. The ideal way to get one is to keep them in another tank until they are big enough.

Once they are big enough, you can then release them into the main tank with all of your other fish. Another option would be to keep them outside of the aquarium altogether, but then you would need something else to take care of feeding if left alone.

Siamese Algae Eater (Crossocheilus oblongus)

molly fish tank mate

Siamese Algae Eaters are among the most popular fish for beginner aquarists. With their big eyes and small size, these fish make a great addition to any aquarium. They will keep algae at bay and provide companionship for other tank mates.

The Siamese Algae Eater is named after its black stripes, which resemble the patterns found on a Siamese cat. They are typically about 6 inches long when fully grown. However, they can grow up to six inches in captivity if given enough food and space. If you’re looking for an active eater with good energy levels, look no further than this little guy!

Otocinclus Catfish (Macrotocinclus affinis)

molly fish tank mate

The Otocinclus Catfish is one of the most popular molly fish tank mates for a few reasons. First, they are generally peaceful and will only attack if threatened. Second, they are easy to care for as long as you feed them regularly and keep their water clean.

Finally, they are small enough to go unnoticed in a large tank and will not eat your plants while providing a nice layer of natural filtration. If these qualities sound appealing then consider adding an Otocinclus Catfish to your molly fish tank!

Perlmutt Cichlid (Labidochromis perlmutt)

Dwarf Gourami (Trichogaster lalius)

molly fish tank mate

The Dwarf Gourami is a popular fish in the aquarium trade due to its attractive colors and easy-to-keep nature. They are often confused with the true Gourami family, but they are actually closely related to the loach.

The Dwarf Gourami is one of the most popular mollies to keep in an aquarium because they are so colorful and generally hardy. It is important to note that there are many different species of dwarf gouramis that look very similar to each other, so it can be difficult to know for sure which species you have.

One common variety seen in pet stores is the Ruby Red or Indian Purple Dwarf Gourami. These are larger than other varieties and have bright red heads with orange striping on their sides and belly.

Bristlenose Pleco (Ancistrus)

molly fish tank mate

The Bristlenose Pleco, or Ancistrus, is a great fish to have in your tank. They are known as the vacuum cleaner of the aquarium because they can eat up algae. Plus, this type of pleco is a good community fish that will not bother other fish and can live with different types of fish, so you don’t need to worry about compatibility issues. The bristlenose pleco is also relatively inexpensive.

Kuhli Loaches (Pangio kuhlii)

molly fish tank mate

Kuhli Loaches are small, colorful fish that can be found in many pet stores. These loaches are nocturnal and like to bury themselves in the substrate during the day. They stay close to the surface at night and feed on algae, making them a great choice for keeping your tank clean of green hair algae.

Kuhli Loaches are not reef-safe as they will nibble on anything they can get their mouths around, including invertebrates and corals. The males also have very long whiskers which is why females should only be kept with other females or males.

Ram cichlid (Mikrogeophagus ramirezi)

molly fish tank mate

These are a type of cichlid fish that is also known as the Ram Cichlid. They hail from South America, but they’re widely available in pet stores and aquarium shops. Despite their name, they don’t really belong to the same family as other more well-known types of cichlids like Convicts.

These fish prefer tanks with plenty of rocks and other decorations where they can find shelter and feel safe. They’ll need a tank of at least 30 gallons. Keep in mind that these fish have been bred for certain colors so not all Ram Cichlids will look exactly alike. These are territorial fish so it’s best to keep just one male per tank unless you have lots of space!

Swordtails (Xiphophorus)

molly fish tank mate

Swordtails are one of the most popular types of mollies and come in a variety of colors. They are also very hardy fish that can live for up to five years, as opposed to other types of mollies which only live for around three years.

These fish are easy to care for and can be kept alone or with others, as long as they have enough space. In an aquarium environment, it’s best to keep them in at least 20 gallons of water with plants and some hiding spots.

Poecilia mexicana (Shortfin Molly Fish)

Swordtails prefer warmer water so it’s important to check their tank temperature every day. A simple way to tell if your swordtail is happy is if they stay near the top of the tank while they swim.

Corydoras (Corydoradinae)

molly fish tank mate

The Corydoras, also known as the cory catfish, is a freshwater, air-breathing catfish that lives in South America and usually stays around the surface of the water. The most popular species of this fish is Corydoras aeneus (bronze corydora), which often grows to about three inches long and can be found for sale at most pet stores.

These are very energetic fish that will do well with other tank mates. They are peaceful and should not bother any other type of fish in your tank. They prefer to live among plants or rocks rather than hiding spots because they like being close to the surface of the water, but there must be something nearby for them to shelter under if they need it! They have a lifespan of up to 10 years if cared for properly.

Water Parameters

Mollies are tropical fish that require a temperature range between 72 to 79 degrees Fahrenheit with a pH of 7.8 to 8.4 and a salt level of 0-1%. They also need to be kept in an aquarium that has plenty of plants, live rock, and caves for hiding places. The tank should have lots of open spaces for swimming.

Mollies prefer tanks without high levels of nitrates or ammonia because these conditions cause them stress.

Aggressive Behaviors

Although mollies are quite peaceful, aggressive behavior in mollies can be caused by overcrowding, not enough hiding spots, or a territorial male. Females are generally less aggressive than males and non-aggressive fish will be preyed upon. To reduce aggression, divide the tank into sections and provide more hiding spots.

Make sure there are more females than males and avoid keeping mollies with other aggressive species. In most cases, if you do not want to breed your mollies for fry it is best to keep them in schools of one sex instead of mixed sexes. If you have a dominant male and a submissive female, chances are that the female will become too stressed out which may lead to her being attacked.

Molly fish food & diet

Mollies are omnivorous and will eat most fish food. However, they seem to prefer live foods, like bloodworms and brine shrimp. They will also eat algae wafers or flake food (if there is no other food source). Be sure not to overfeed your molly with too much food at one time; feed them a small amount of their favorite food twice a day.