Will a Betta Fish Kill a Goldfish? (Is it Even Possible!)

Will a betta fish kill a goldfish? If you’ve wondered if a Betta Fish will kill your beloved goldfish, the answer may surprise you!

A Betta Fish can attack and even kill a pet goldfish in certain circumstances. We’ll take an in-depth look at this topic today to help explain the risks involved and what steps to take should it occur.

So join us as we explore whether it is even possible for one fish species to hurt another – and perhaps learn why no two animals are quite alike.

Will betta fish kill goldfish

Are Betta Fish Aggressive?

Yes, Bettas can be aggressive when they feel threatened or stressed. They’re known to flare their fins and gills, chase each other around the quarantine tank, and show signs of aggression like biting or chasing.

However, any aggression is most likely due to something in their environment that’s causing stress, like overcrowding or insufficient hiding spaces.

Ensuring your Bettas have plenty of space and hiding spaces should help reduce aggression levels in your aquarium.

Can Betta and Goldfish Live Together?

Can Betta fish live with goldfish? No, Betta and goldfish should not be housed together. Betta fish are fin nippers territorial and will become aggressive towards goldfish, which can cause harm or even death to the goldfish if they’re kept together.

Additionally, bettas are tropical fish and require warmer water temperatures than your average goldfish and may suffer in colder water temperatures. Keeping them in separate aquariums is best to ensure their safety and health!

A betta’s ideal water temperature is critical for its well-being. Temperatures below 75 degrees can cause severe temperature shock, interrupting their metabolism and appetite while making them sluggish – conditions that may lead to diseases like fin rot due to lack of circulation.

By contrast, goldfish thrive in cooler waters between 65 and 72 degrees Fahrenheit.

Will Betta Fish Fight with Goldfish?

Yes, betta fish will fight with goldfish. Siamese fighting bettas are naturally territorial and aggressive and often become territorial even when housed alone.

When two males of different species are housed in a small fish tank, they may display aggression towards each other as they compete for dominance.

Goldfish can provoke betta fish into attacking them by swimming near their faces or trying to stake out territory in the tank. To prevent fighting between your Betta and goldfish, it is best to house them in separate tanks.

Will a Betta Fish Kill a Goldfish?

Will betta fish kill goldfish? No, a betta fish will not usually kill a goldfish. Betta can become aggressive in small tanks and attack other fish, but they usually only nip at the fins of larger fish species like goldfish.

Keeping bettas with any other type of fish is not recommended, as their presence easily stresses them out. If you choose to keep Betta and goldfish together, it is essential to provide them with a large tank so they have plenty of room and can avoid confrontation.

Can a Male Betta Live with Goldfish?

Male betta fish cannot live with cold water fish like goldfish due to their different needs for habitat and temperature. Betta fish require warm water of about 78-82 degrees F. 

Unlike bettas, goldfish prefer cooler temperatures of about 65-68 degrees F and need more oxygenated water than betta fish.

They also have much larger habitats with multiple hiding places that a single betta fish could not access or defend from the goldfish.

Keeping male bettas and goldfish in separate aquariums is best to prevent potential aggression or injury.

Can Female Betta Fish Live with Goldfish?

No, female Betta fish cannot live with goldfish. Goldfish are much larger than Betta, and their compatible tank mates should be selected carefully.

Goldfish develop a lot of waste, which can quickly increase ammonia levels in the tank water

do betta fish need a filter

if not filtered properly. This could put the smaller and more sensitive Bettas at risk for ammonia spikes poisoning or even death.

In additionGoldfish Eat Quickly and typically have quite aggressive feeding habits and may outcompete other species in the goldfish aquarium for food. Due to these factors, it is generally recommended that female Betta fish should not be housed with goldfish to ensure their safety and well-being.

Can a Fantail Goldfish Live with a Betta?

No, Fantail Goldfish should not be kept with Bettas Fish. Fantail Goldfish are much larger than Bettas, and their feeding habits can be aggressive.

Fantail Goldfish and Betta Fish may be a better pairing – due to their dietary needs; bettas need high-protein meals such as freeze-dried bloodworm or brine shrimp.

In contrast, goldfish are omnivores who naturally feed on various aquatic plants and small animals in the wild. These two species should have separate food sources for optimal nutrition when kept together!

Goldfish also need more oxygenated water than Bettas, making it challenging to provide them both with the ideal environment they need in a single tank.

Is It Worth Keeping Betta Fish and Goldfish Together?

No, it is not worth keeping Betta Fish and Goldfish together. Despite their similarities in size, the two species have different needs regarding water temperature, oxygen levels, and food sources.

Keeping them together can put the more sensitive Betta fish at risk for ammonia poisoning or even death due to high ammonia levels in the water.

In addition, goldfish may outcompete Bettas for food, and their larger size can make it difficult for them to avoid aggressive behaviors. It is best to keep Betta Fish and Goldfish in separate aquariums for both species’ optimal health and safety.

Overall, Betta Fish and Goldfish should be kept separate as they have different needs and can easily stress each other out. Providing them with their tanks and food sources for the ideal environment and nutrition is best.

5 Reasons Why You Shouldn’t Mix Goldfish and Betta Fishes

  • – Water Temperature Differences: Betta fish like warm water temperatures of 78-82 degrees Fahrenheit, whereas goldfish prefer cooler temperatures around 65-68 degrees.
  • – Need Different Water Hardness to Survive: Betta fish require harder water, while goldfish need softer water to survive.
  • – Tank Cleanliness Needs Vary: Goldfish produce more waste than bettas, so frequent water changes are maintained to keep the water quality ideal for both species.
  • – Similar Tank Decorations Will Not Be Suitable: While goldfish and betta fish have similar tank decoration requirements, they will not be suitable for both.
  • – Living Conditions: Tank Size: Goldfish require more swimming space than betta fish, so having them in the same tank could harm their health.

Overall, keeping Betta Fish and Goldfish separate is best to provide them with ideal living conditions. This way, they can each have their environment tailored to meet their specific needs.

Keeping them together could put both species at risk for various health issues and should be avoided. If you want to keep both species in the same tank, provide each one with space and food sources.

Do Goldfish and Betta Fish Get Along?

Unfortunately, no. Goldfish and bettas are two very different species of pet fish that should not be kept in the same tank.

This is because goldfish require a lot of space to swim around and consistently cool temperatures. In contrast, bettas need warm water with plenty of vegetation for hiding places — conditions most likely not found in the same tank.

Additionally, both fish can become aggressive toward one another due to their differing sizes and personalities.

What Fish Can Live with Goldfish?

If you want to add other species of fish to your goldfish tank, many compatible options can live peacefully with fancy goldfish.

Tetras, guppies, mollies, and platys can live happily in the same tank as goldfish. These fish are compatible with your goldfish due to their small size, peaceful nature, and similar water requirements.

Ensure you provide plenty of hiding places for them to help reduce stress and ensure the tank is well-filtered to maintain clean water conditions.

It is important to note that many of these fish prefer slightly warmer water than goldfish, so adjust the temperature accordingly.

Can Betta Fish Eat Goldfish Food?

Though betta fish can survive on goldfish food, it is essential to note that this type of meal cannot satisfy these unique creatures’ dietary needs.

To ensure a healthy aquatic lifestyle for your Betta, consider providing them with their specialized nutrition! Betta fish enjoy live or frozen betta food such as bloodworms, daphnia, and brine shrimp.

These are excellent sources of protein and vitamins that help keep your Betta solid and vibrant. Additionally, you can provide them with high-quality goldfish betta fish food or pellets to ensure all their dietary needs are met.

Finally, adding fresh vegetables such as blanched peas and zucchini to your Betta’s diet can help digestion and provide essential vitamins.

Can Betta Fish Kill Other Fish?

Will bettas kill another fish? A betta fish can become aggressive toward other fish, but it is much more likely to ignore them.

If you decide to house multiple fish in the same tank, ensure enough space and vegetation for each creature to hide and rest. Additionally, provide plenty of food sources that all fish can access without competing for resources.

If you notice any aggression or signs of charge, it is best to immediately move the siamese fighting fish to its own tank to prevent any harm from coming to other inhabitants.

Can Betta Fish Live with Other Types of Fish?

Your Betta can make plenty of friends in the fish tank! With an appropriate assessment of your pet’s personality, a carefully selected selection of compatible species may be great companions.

Good tank mates for your betta splendens include tetras, guppies, mollies, and platys. Due to their peaceful nature and generally smaller size, these fish are excellent companions for your Betta.

However, it is essential to ensure that all fish have enough food and space to feel safe in the tank. If you notice any aggression or distress, separate your Betta immediately.

Providing a safe and comfortable environment for all your fish can ensure everyone in the tank will live happily together.

What Fish Can Betta Live With?

What Fish Can Live with Bettas? If you want to add other species of fish to your betta tank, many compatible options can live peacefully with bettas.

Kuhli Loaches, Ember Tetras, Malaysian Trumpet Snails, Harlequin Rasboras, and even Corydoras catfish make excellent bettas tankmates.

These fish are compatible with your Betta due to their small size, peaceful nature, and similar water requirements. Ensure you provide plenty of hiding places for them to help reduce stress and ensure the tank is well-filtered to maintain clean water conditions.


So, will a betta fish kill a goldfish? To summarize, a Siamese fighting fish can kill a goldfish, but it most likely won’t happen if the two are adequately cared for and kept in separate tanks. Betta and goldfish have very different needs regarding water temperature and oxygen levels, so keeping them together can be dangerous. However, with proper care and attention from their owners, both can live healthy lives within the same aquarium.

As long as regular testing is done to monitor water conditions and non-compatible fish are adequately separated, any owner can safely keep Betta and goldfish together with peace of mind. All fish keepers must research species compatibility before adding new pets to their tank (or considering pairs of fish) to guarantee that every pet fish has a safe and secure environment. While betta fish may seem harmless enough at first glance, they should still be handled with caution when around other fish species.

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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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