Choosing the Right Tank Mates for Your Betta Fish: Factors to Consider

Tiny Little Paws
4 min readJun 23, 2023

Betta Tank Mates: Betta fish, also known as Siamese fighting fish, are beautiful and vibrant aquatic creatures that are popular among fish enthusiasts. However, it’s important to note that bettas are known for their aggressive nature, particularly towards their own species and similar-looking fish. Despite their aggressive tendencies, bettas can coexist peacefully with other fish species if you choose their tank mates carefully.

Factors to Consider When Choosing Betta Tank Mates


The most critical factor when choosing Betta Tank Mates for your betta fish is compatibility. Not all fish species are suitable companions for bettas, as some may trigger aggression or become targets of aggression themselves. To ensure compatibility, it is important to consider the following:

a. Temperament: Opt for peaceful fish species that are not aggressive or known to nip fins. Avoid selecting fish that resemble bettas or those with long, flowing fins, as this may provoke territorial behaviour in your betta.

b. Size: Choose tank mates that are of similar size to your betta fish. Fish that are significantly smaller may be seen as prey, while larger fish can intimidate or bully your betta.

c. Swimming Level: Consider the swimming level preferences of your potential tank mates. Betta fish are known to inhabit the mid to upper levels of the aquarium, so selecting fish that prefer the bottom or top levels can minimise competition for territory.

Habitat Requirements

Different fish species have varying habitat requirements, such as water temperature, pH levels, and filtration needs. It is crucial to select tank mates that share similar water parameter needs with your betta fish. This ensures that all fish in the tank thrive in a healthy and stable environment.

Before introducing any new fish, research their specific requirements and compare them to your betta’s needs. This will help you identify compatible tank mates that can coexist comfortably in the same aquarium.

Space and Tank Size

The size of your aquarium plays a significant role in determining the number and types of fish you can keep with your betta. It is essential to provide ample space for each fish to establish their territory and swim freely. A crowded tank can lead to stress, aggression, and poor water quality.

The minimum tank size recommended for a betta and its tank mates is 10 gallons (37.8 litres). However, larger tanks are generally preferred as they provide more space and a greater chance for successful community living.

Behavioural Observation

Observing the behaviour of your betta fish is crucial when introducing potential tank mates. You can gauge their reaction by placing a small, temporary divider or transparent barrier within the tank to separate the betta from the other fish. This allows them to become familiar with each other’s presence without direct contact.

Monitor your betta’s behaviour for signs of aggression, stress, or excessive flaring. If the betta exhibits continuous aggression or distress, it is advisable to choose different tank mates or reconsider introducing any new fish.

Number of Tank Mates

When selecting tank mates for your betta, consider the number of fish you plan to introduce. Adding multiple fish at once can help disperse aggression and establish a more balanced community tank. However, avoid overcrowding the tank, as it can lead to territorial disputes, increased waste production, and poor water quality.

Suitable Tank Mates for Betta Fish

Now that we have discussed the factors to consider, let’s explore some popular and suitable tank mates for betta fish:

Corydoras Catfish

Corydoras catfish are peaceful bottom-dwelling fish that can coexist harmoniously with bettas. They are known for their small size, making them an ideal choice for a community tank. Corydoras prefer to live in groups, so keeping at least three of them is recommended.

Neon Tetras

Neon tetras are small, peaceful fish that add a splash of colour to your aquarium. They are known for their active behaviour and can coexist well with bettas. Neon tetras are schooling fish, so keeping them in groups of six or more is advisable.

Harlequin Rasboras

Harlequin rasboras are peaceful fish with vibrant colours. They have a similar temperament to neon tetras and can make great Betta Tank Mates for bettas. Keeping them in groups of six or more will ensure their well-being.

Cherry Shrimp

Cherry shrimp are small, non-aggressive crustaceans that can serve as an interesting addition to a Betta Tank Mates. However, it’s important to note that bettas may view them as food, so providing plenty of hiding places and dense vegetation is essential for the shrimp’s survival.


Choosing the right Betta Tank Mates for your betta fish requires careful consideration of compatibility, habitat requirements, space, and behavioural observation. By following these factors and recommendations, you can create a community tank that provides a safe and harmonious environment for your betta and its tank mates.

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