Do Goldfish Eat Other Fish? – Here’s How to (Stop Them!)

Do goldfish eat other fish? The answer to this common question is both yes and no. Goldfish are omnivorous and can eat both plant and animal material. However, they typically do not eat other fish unless they are tiny or the goldfish are extremely hungry.

In most cases, goldfish will consume small aquatic invertebrates such as brine shrimp, bloodworms, and terrestrial insects that fall into their tank.

Goldfish are one of the most popular pet fish, and for a good reason – they’re easy to take care of and fun to watch. But what happens when your fish starts eyeing your other fish as a potential meal?

So, the short answer is that most of the time, goldfish do not eat other fish. But there are exceptions to every rule, so it is always important to keep an eye on your aquarium inhabitants!

In this blog post, we’ll explore whether or not goldfish eat other fish and how you can stop them from doing so!

Will Goldfish Eat Other Fish in the Tank?

It’s important to remember that goldfish are not natural predators and typically won’t kill other fish outright. However, they can undoubtedly damage by nibbling on their fins or scales, ultimately leading to death.

For this reason, it’s important to avoid keeping too many different types of fish together in the same tank, especially keeping an eye on your fish when another fish is present.

In general, goldfish only eat other fish in a tank if the prey is small enough for them to swallow. Therefore, if you have larger fish in your tanks, such as angelfish or tetras, goldfish are unlikely to see them as food.

If you have small fish species such as guppies, a popular choice for goldfish tanks, your fish may see them as food. Similarly, goldfish attack and eat small fish fry in the tank.

It’s also worth noting that goldfish will sometimes try to attack other fish out of curiosity. 

If your fish is spotted “nipping” at the fins or tail of other fish in the tank, it is likely an act of exploration rather than hunger.

In these cases, it is essential to keep a close eye on your fish and ensure that it does not become overly aggressive toward its tank mate.

Why Is My Goldfish Eating My Other Fish?

Why is my goldfish killing my other fish? If your goldfish is killing or seems to be trying to kill other fish in the tank, it could be a sign of feeling stressed or threatened by the other fish.

This can be especially true if your goldfish is the only one in the tank and feels like it is being “crowded” by other tank mates.

Sometimes, it may signal that your fish needs to get more food. If your goldfish is particularly hungry, it may eat whatever food sources are available in the breeding tank – including other fish! So, take your time to pick suitable tank mates for your fish.

Do Goldfish Eat Other Dead Fish?

Goldfish are not very good at containing themselves, so if one of your fish dies in the goldfish tank, there’s a chance that they will try to eat it effortlessly, removing any trace.

Goldfish eat dead fish if hungry; the other fish is already deceased.

That said, it’s essential to ensure that you provide your fish with enough food regularly so they don’t resort to scavenging the sick fish.

Do Goldfish Eat Other Fish Eggs?

Goldfish do eat other fish eggs. In addition, they eat various foods, including small fish, invertebrates, and plants. This helps them maintain their position as one of the most versatile freshwater fish.

Given their willingness to eat other fish eggs, it’s essential to take precautions when breeding fish in the same tank as goldfish. First, remove any eggs your goldfish may try to eat before hatching. 

Be especially vigilant when breeding goldfish or any fish in the community tank.

If you notice that your fish is eating the sticky eggs of other fish in its tank, removing them from the tank is best to prevent goldfish from eating eggs and further losses.

Do Goldfish Eat Their Babies?

It’s unclear whether or not goldfish actually eat their goldfish babies, but it is certainly something that happens in the wild.

Goldfish spawn in masses and the eggs and larvae are typically consumed by predators or other fish in the tank. However, if there are no predators, the eggs and larvae will usually survive for a few days before being eaten by the parents.

Do Goldfish Eat Smaller Fish?

Do goldfish eat other small fish? Yes, goldfish can and will eat other smaller fish in a tank. This is because these fish are opportunistic feeders, meaning they will take advantage of any available food source.

Goldfish do not actively prey on smaller fish, but they will scavenge and eat any sick or injured fish that are available. It can also be cannibalistic and eat smaller fish if the opportunity arises.

So, while goldfish typically do not go out of their track to hunt down smaller fish, they will not hesitate to take advantage of a vulnerable target.

Do Goldfish Eat Each Other?

Do goldfish eat other gold fish? No, goldfish do not eat each other. Goldfish are herbivorous, and their diet consists primarily of vegetable matter.

While they can consume small amounts of meat or insects, cannibalism is highly unlikely as it does not provide the nutrients they need to survive.

Eating another goldfish can lead to health problems due to the lack of nutrients in their diet.

Why Did My Goldfish Eat My Other Goldfish?

My goldfish ate my other fish – why? The most likely reason your goldfish ate another fish is that it felt stressed or threatened.

If the tank is overcrowded or the other fish is larger than the goldfish, it could make the fish feel like it needs to defend its territory or food sources.

It is also possible that your goldfish was suffering from hunger, which could lead to trying to scavenge any available food source, including other fish.

In these cases, the best action is to provide your goldfish with enough food and ensure that the 20 gallons of water are well-spent. Also, good water quality will help reduce stress and prevent any further issues with cannibalism.

Why Is My Goldfish Eating the Other Fishes Tail?

Goldfish are territorial animals, and they often eat the tails of other fish to protect their territory and mark boundaries.

This can be a massive problem in schools of fish where one dominant fish can keep the others from feeding. If your fish is doing this, it may be a sign that you need to give them more space or separate them into an individual quarantine tank.

How to Stop Goldfish from Eating Other Fish?

How do I stop my goldfish from eating other fish? Goldfish eating other fish fins and tails can be prevented by giving them more space, providing enough food, and eliminating any sources of stress.

· If the tank is overcrowded or if the other fish are larger than your fish, it is vital to separate them into the separate tank to give each one its territory.

· It is also essential to make sure that your fish is getting enough food, as hunger can sometimes lead to it trying to scavenge any available food sources.

· Finally, reducing any sources of stress in the tank, such as light or noise, will help to keep your goldfish calm and reduce its territorial behavior.

Which Fishes Cannot Live with Goldfish?

What fish cannot live with goldfish? Most fish cannot live with goldfish because they will compete for food and space. They are also quite aggressive and can easily outcompete other fish for resources.

The most common fish that should not be kept with fancy goldfish include guppies, tetras, angelfish, cichlids, mollies, and koi. These fish are all smaller or weaker fish than goldfish and will not be able to survive in the same tank.

If you want to keep other fish spices with your fish, choosing larger species, such as barbs, gouramis, or plecos, can outcompete them for resources. This will help to ensure that both fish can thrive in the same tank.

Aggressive barbs, African cichlids, and other large cichlids will consume or harm goldfish. Fish that are too aggressive or too big for a goldfish aquarium can be housed in their own tank.

A mixed aquarium can be a great way to enjoy different types of fish, but it is important to ensure that your fish are compatible and have enough space and food to survive.

Fish keepers remember: By following these easy tips, you should be able to enjoy a healthy and happy fish tank.

Why Can’t Goldfish Live with Other Fish Species?

Goldfish cannot live with other fish species because they are larger and more aggressive than many different types of fish.

Goldfish are messy fish. They produce a lot of waste, ammonia, and nitrate, which could potentially kill other inhabitants of your tank if it isn’t diluted correctly or filtered out quickly enough!

They are also very territorial and will try to dominate any other fish in the tank, which can lead to stress or even death for the smaller species.

When male goldfish are kept in a tank with other fish, it is essential to ensure that the tank is manageable and that all fish have enough food and space.

In addition, it is vital to ensure that the tank is large enough and well-maintained to provide a suitable habitat for all inhabitants.

How Often Do Goldfish Eat?

Goldfish need to eat daily and can consume quite a bit of food. They are omnivorous animals that will eat plant and animal matter. Generally, the best approach is to feed your fish small amounts of food regularly throughout the day.

It’s important not to overfeed your fish, as uneaten food can cause ammonia to build up in the tank, harming fish.

In general, goldfish should be fed two to three times a day with a total of about 1/4 cup of food per day. This should be divided into smaller meals throughout the day.

It is also essential to ensure that you give your fish a varied diet with a mix of commercial fish food and fresh vegetables such as algae, lettuce, peas, and cucumber. This will ensure that your fish stay healthy and happy.

In conclusion, for optimal health, goldfish need to be fed daily with small portions of food every few hours.

Commonly Asked Questions About Do Goldfish Eat Other Goldfish (FAQ)

Do Black Moor Goldfish Eat Other Fish?

No, black moor goldfish are not known to eat other fish. They may become aggressive towards other fish if they feel threatened or if there are not enough food sources to go around, but they do not typically hunt other fish for food.

Do Oranda Goldfish Eat Other Fish?

No, Oranda Goldfish do not eat other fish. They are a type of carp and are bottom feeders. They will eat whatever food falls to the tank bottom, such as algae, but they are not known to hunt other fish for food.

Do Goldfish Eat Guppies?

Yes. Goldfish will eat the guppy fry and, eventually, the adult guppies. Goldfish will not usually eat guppies, but they may become aggressive toward them if the tank is too small or there is not enough food to eat.

Do Goldfish Eat Baby Goldfish?

Yes. Adult goldfish may eat small fry or baby fish if they are not provided with enough food or the tank is too crowded.

Do Goldfish Eat Each Other’s Tails?

No, male and female goldfish do not usually eat each others’ tails. However, if the tank is overcrowded with too many goldfish and lacks enough food or space, they may become aggressive fish and bite each other’s tails.

Will Goldfish Eat Snails?

Yes, goldfish will eat snails. However, this is not recommended as it can disrupt the balance of the tank and cause harm to the other inhabitants. Instead, goldfish should be provided with various foods, such as vegetables and commercial fish.


Goldfish can be a great addition to your home aquarium. They are relatively low-maintenance and can add beauty and relaxation to your space. When considering what other fish to add to your fish tank, it is essential to research and make sure the fish you choose are compatible in size, temperament, and diet. So, why do goldfish eat other fish? Goldfish are omnivores and will eat other smaller goldfish, so avoid adding any fish that could become snacks for your goldie. With some planning, you can create a peaceful and stunning underwater oasis that you and your goldfish will enjoy for years to come.

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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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