Commonly Asked Goldfish Questions

This article is an extension of our care guide for Common Goldfish species which will cover some of the common questions asked about these species. The answers here on this page are brief and to the point; but in order to fully understand the needs of these fish we highly recommend reading our full comprehensive guide to Goldfish.

You can use the table below to jump to the question you need an answer to. 

Are Goldfish Good Pets?

Goldfish are great pets for many reasons. Not only are they inexpensive and easy to care for, but they can also be trained to recognize their owners and even perform tricks. 

Goldfish also have a long lifespan when taken care of properly, with some varieties living up to 30 years old! 

This makes goldfish perfect for fish-keepers of any level – from beginners who are just starting, or experienced keepers looking for an entertaining pet. 

In addition, goldfish come in a variety of shapes and colors that make them visually appealing – there’s something special about watching these beautiful creatures swim around your tank! To learn more about this species you read our goldfish care guide to understand these fish better.

Are Goldfish Invasive?

Goldfish are considered to be an invasive species in some parts of the world. The goldfish have been released into many bodies of water and are a threat to the native creatures. 

When released into non-native habitats such as lakes and rivers, goldfish can outcompete native species for resources like food which can cause a decrease in biodiversity over time.

Therefore it is important for owners not to release their pet goldfish into nature.

Are Goldfish Smart?

Goldfish are often underestimated as pets due to their small size and seemingly “simple” nature. However, goldfish can be surprisingly smart creatures. 

They can recognize people who feed them and remember routines, including feeding times. 

Goldfish also display signs of curiosity by exploring their environment and even playing with toys that are provided for them in their tanks.

Can Goldfish Eat Betta Food?

The short answer is: yes, goldfish can eat betta food. Goldfish are omnivores and will happily consume a variety of different types of food, including betta food. 

Betta fish are carnivorous and their diet consists mainly of protein-rich insects or larvae, so their food is designed to meet those dietary needs. 

This means that the ingredients in betta food should be suitable for goldfish as well. 

Not only that, but the small size of most betta pellets makes them easy for smaller goldfish to digest without issue.

However, it’s important to note that while goldfish may benefit from some additional proteins found in betta foods, they shouldn’t rely solely on this type of diet as they need a mix of other nutrients too. 

Goldfish require lots of fiber and carbohydrates to stay healthy which cannot be found in large quantities in betta foods alone. 

As such it’s best used as an occasional treat or supplement rather than a primary source of nutrition for your pet goldfish.

Can Goldfish Eat Bloodworms?

Yes, goldfish can eat bloodworms. Bloodworms are a type of midge larvae that live in freshwater habitats and are high in protein, making them an excellent food source for goldfish.

They provide essential nutrients such as calcium, iron, and phosphorus which helps to keep the fish healthy and vibrant.

The worms also contain fatty acids that help boost the immune system of the fish as well as aid digestion.

It’s best to feed small amounts at a time with other fish foods such as pellets or flakes being fed alongside it. This will ensure your goldfish is getting all of its nutritional needs while still enjoying a tasty treat!

Can Goldfish Eat Bread?

Yes, goldfish can eat bread but it’s not recommended. Bread is a great source of carbohydrates for goldfish and provides them with a lot of energy. 

However, it should not make up the bulk of their diet as too much bread can lead to digestive and swim bladder problems in fish.

Can Goldfish Eat Tropical Flakes?

Yes, goldfish can eat tropical flakes. Generally speaking, most tropical fish flakes contain ingredients suitable for a wide range of species, including goldfish. 

However, there are some considerations to keep in mind when feeding your goldfish flakes intended for tropical species. 

For example, many brands of flake food marketed towards tropical species may contain higher levels of protein than what is optimal for a goldfish diet. 

Goldfish should consume foods with lower levels of protein because they are not as active swimmers and require fewer calories from their meals compared to other types of aquarium fish.

Can Goldfish Live In A Bowl?

Absolutely Not! Keeping goldfish in a bowl is cruel to the fish and very unhealthy. Goldfish need an adequate amount of oxygen, space to move around, and clean water in order for them to thrive. 

Bowls are not ideal environments for goldfish because they do not have a filtration system to keep the water clear as larger aquariums do. 

Additionally, bowls are very small and goldfish grow super large for a bowl. Keeping goldfish in a bowl will lead to different illnesses.

We highly recommend reading our full care guide for goldfish to understand the right aspects of caring for these beautiful species.  

Can Goldfish Live In Saltwater?

No, goldfish cannot live in saltwater. Goldfish are freshwater fish, and they will not survive in saltwater environments. 

Saltwater is too strong for the delicate organs of a goldfish, and it can cause severe health problems and then death.

Goldfish require an environment that is typically found within freshwater bodies such as lakes, rivers, and streams. 

Can Goldfish Live With Other Fish?

Yes, goldfish can live with other fish in the same tank. They are generally peaceful and will not attack or bother any other fish that is living alongside them. 

Goldfish do best when kept in groups of at least four, as this encourages natural behaviors like shoaling and foraging for food.

A key factor to consider when deciding which types of fish to keep with your goldfish is size. Goldfish require a lot more room than most tropical species since they grow quite large.

The “Tank Mates” section of our goldfish care guide has the right recommendations for tank mates to start with.

Can I Put My Goldfish In Tap Water?

No, you cannot put goldfish in tap water without first treating it. Tap water contains chlorine and chloramine which can be very harmful to fish. 

These chemicals are designed to kill any bacteria or parasites that may be present in the water. But they will also damage your goldfish’s gills and cause death if not removed before adding them to the tank. 

Before introducing your goldfish into a new tank filled with tap water, you must cycle the tank and add a dechlorinator or neutralizer to remove these dangerous compounds from the water. 

Do Goldfish Like Music?

Yes, goldfish like music. Research has indicated that they are able to recognize and distinguish between different types of music. 

Goldfish can hear various sounds traveling through the water thanks to their organs designed specifically for underwater hearing. 

Playing some soothing tunes near their tank is a great way to keep them entertained and prevent stress-related issues such as fin-biting or listlessness.

It’s important not to exceed certain noise levels when playing music around your goldfish since they may become scared or stressed out by loud noises. 

However, if you want your pet fish to have some fun while listening to cool tunes, try experimenting with different genres of music at reasonable volumes.

Do Goldfish Need A Heater?

In general, goldfish do not need a heater to be healthy and thrive. They can tolerate a wide range of temperatures from 50°F to 81°F (10°C and 27°C). 

However, if you want to breed your goldfish or are keeping fancy goldfish, then you may need to consider installing a heater in your tank.

This is because you will likely need to replicate seasonal temperature changes found in their natural habitat for proper breeding.

If you keep your goldfish indoors and your home is heated to accommodate humans, then no heater is needed. The preferable temperatures for humans are within the range these fish like to live in.

Do Goldfish Need To Be In Pairs?

No, goldfish do not need to be in pairs. They can perfectly live a happy life alone.

It is also important to consider that having two fish may require more space than just one. Both fish should have enough room to swim around and explore their environment without feeling overcrowded.

That being said, some people prefer the idea of having two goldfish together for various reasons such as aesthetics or simply wanting their pet (s) to feel less lonely. 

If you want to keep two goldfish together, it is best done with larger tanks where there is plenty of space for each fish. An adequate filtration system is also necessary as goldfish are very messy fish and can pollute the water quickly. 

How Often Should I Clean My Goldfish Tank?

It is best to do a full water change and gravel cleaning each week, as this will remove any dangerous toxins that can build up in the water. 

You should also perform “deep-cleaning” every month or two where you drain roughly one-third of the tank’s water and clean all the filtration and any equipment used in the tank. 

Is It Ok To Touch Goldfish?

It is generally safe to touch goldfish, but it should be done with caution. When touching your goldfish, make sure to use clean hands and handle the fish gently.

Fish are not like cats or dogs and they don’t like to get petted. Touching goldfish can cause damage to their fins and will give the fish a lot of stress. 

In general, if there is a need to touch a goldfish, you should do so sparingly and with care. 

Should I Feed My Goldfish Every Day?

Yes, it is important to feed your goldfish every day. 

To keep them healthy and happy, you should provide your goldfish with a balanced diet of high-quality foods. They can receive a variety of foods such as flakes, pellets, and freeze-dried or frozen treats. 

The amount of food you give them should be adjusted depending on their age; younger fish need more frequent feedings than older ones. 

When feeding your fish make sure not to overfeed them as this can lead to indigestion, bloating, and even death in extreme cases. 

Additionally, any uneaten food should be removed from the tank after the two or three-minute feeding period has elapsed. This will prevent contamination and disease within the tank environment. 

Why Do Goldfish Die After A Water Change?

Goldfish may die after a water change for multiple reasons. One of the most common mistakes is not gradually acclimating them to the new water temperature, which can cause shock and death. 

Additionally, if chlorine or other chemicals are untreated before adding the water to the tank can also lead to an untimely death due to poisoning. 

It’s possible that your goldfish was already ill before you changed the water. In some cases changing the aquarium conditions can be too stressful on a fish that’s already unwell and might trigger its demise.

To prevent any future issues with your goldfish we recommend reading our goldfish care guide.

Will A Goldfish Die If You Touch It?

No, a goldfish will not die if you touch it. However, it is important to exercise caution when handling your goldfish. 

Make sure that your hands are clean before touching the fish and handle it gently to avoid damaging its delicate body. 

It’s also important to only take the fish out of water for short periods as prolonged exposure can cause stress and shock. This can lead to other health complications or even death in extreme cases.

Will Goldfish Eat Algae?

Yes, goldfish will eat algae. Algae is a natural part of their diet in the wild, so it’s no surprise that they would enjoy munching on it in captivity as well. 

Goldfish are omnivores, which means they will eat almost anything, including vegetables and small amounts of algae. 

However, keeping a bit of alga in the tank can be beneficial for your goldfish’s health. It provides them with essential vitamins and minerals that may otherwise not be available from other commercial foods.

Will Goldfish Eat Guppies?

No, goldfish will not eat guppies. Goldfish are omnivorous and prefer to consume plant-based foods such as algae and small invertebrates like daphnia or brine shrimp.

However, larger goldfish might try to eat the smaller guppies. So it’s best to not mix the two species if the tank is small. 

Will Goldfish Eat Mosquito Larvae?

Goldfish are omnivorous creatures, meaning they will eat both plants and animals. Mosquito larvae make up part of their natural diet in the wild. 

In an aquarium setting, goldfish can be fed mosquito larvae if desired, although it is not necessary. Most commercial fish foods contain all the nutrients a goldfish needs to thrive.

It’s important to note that feeding your goldfish too many larvae-based foods can lead to health problems like constipation or bloating due to its high-fat content.

Will Goldfish Eat Snails?

Yes, goldfish will eat snails. Snails can provide a nutritious source of protein for your goldfish. The calcium in the snail shells also helps with their digestive health.

These fish only eat the smaller snails and usually leave the larger snails alone. If you have a pest snail problem then having a goldfish will help you clean it out.

Our goldfish care guide will answer most of your questions in a contextual manner; we highly recommend reading it for a better understanding of this fish.

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