Bubble Eye Goldfish: Care, Size, Tank Mates & More!

Bubble Eye Goldfish are unique and beautiful, but they require specialized care.

This article covers their care, size, suitable tank mates, and interesting facts, and it will provide valuable information for experienced and beginner aquarium hobbyists. It covers their dietary needs, behavior, and temperament.

With this knowledge, you can provide the best possible care for your Bubble Eye Goldfish.

So, sit back, relax, and let’s dive into the world of Bubble Eye Goldfish care!

Key Takeaways

  • Bubble Eye Goldfish require specialized care and environment due to their delicate bubbles and disease susceptibility.
  • The tank should be set up with a smooth substrate and decorations to avoid damaging bubbles, and regular water changes and filtration are essential.
  • They have a relaxed temperament and can get along with other peaceful species, but suitable tank mates are those with similar handicaps.
  • Breeding requires a separate tank and soft plants or breeding mops, and the spawning process can take several hours.

Species Summary


This species is a member of the “Fancy Goldfish” family and is easily identified by their eye bubbles, which are fluid-filled sacs.

Like many other fancy Goldfish, the Bubble Eye was originally developed in China through careful cross-breeding of the Prussian Carp. These fish are not found in the wild and are exclusively captive-bred for aquariums worldwide.

Caring for Bubble Eye Goldfish may seem daunting, but proper preparation can be manageable. Don’t be discouraged by the specific care requirements of these charming and distinctive fish, as they can make a great addition to your aquarium. You can ensure that they thrive in their environment with proper attention and care. By understanding their needs, you can provide them with the proper care.

Average Bubble Eye Goldfish Size

Bubble Eye Goldfish can reach an average length of 5 inches when fully grown. They won’t grow any larger than that! That means you can keep them in smaller aquariums without worrying about them outgrowing their home.

Compared to other Goldfish species, Bubble Eye Goldfish are quite manageable. You won’t have to worry about constantly upgrading their tank as they grow. Plus, their unique appearance makes them a great addition to any aquarium.


Did you know that Bubble Eye Goldfish can live up to 10 to 15 years? They are known to have a longer lifespan compared to other freshwater fish. Taking care of them is crucial if you want them to reach their full potential. The key factors that affect their lifespan are water quality and diet.

But don’t worry! These fish can live beyond their average life expectancy with proper care and attention. In fact, some have even lived for more than 20 years! So, if you want your Bubble Eye Goldfish to thrive, provide them with the best possible care.


Meet the Bubble Eye Goldfish! These aquatic creatures are known for the sacs underneath their eyes, which contain fluids that make the bubbles jiggle as they swim. Contrary to popular belief, these sacs aren’t filled with air.

Some scientists believe that the fluid can even stimulate human cell growth! But be careful not to pop these delicate sacs as they can easily deflate. Luckily, they can heal independently and refill with fluids, but the regrown sacs may not return to the same size.

The size of the sacs can vary from fish to fish, and on some, they remain manageable. However, others can get so big that they make swimming difficult. The bulbous shape of the sacs, combined with the direction of their eyes, also affects the fish’s vision.

Unfortunately, these fish don’t have a dorsal fin, but they make up for it with a double tail that splits into four points. Their round and egg-shaped bodies limit their movement, but their colorful scales compensate for it.

Speaking of colors, Bubble Eye Goldfish come in various hues and patterns. You can find solid fish in gold, orange, red, brown, and white, or even multiple colors like red and white spots, red and black spots, or a calico pattern.

Sexing these fish can be tricky. Determining the sex of younger fish can be a challenging task. However, as they mature, females acquire a rounder and fuller shape, while males develop small bumps, called tubercles, on their heads.

Overall, Bubble Eye Goldfish are fascinating creatures with unique physical characteristics. They will catch your eye, from bubble sacs to colorful scales. Remember to handle them carefully and watch out for those delicate bubbles!

Bubble Eye Goldfish Care

Bubble Eye Goldfish are a unique and delicate species that require specialized care to maintain their health and well-being. Beginner hobbyists should avoid these fish because they require specific care and are fragile. However, Bubble Eye Goldfish can thrive in a suitable environment with proper attention and care.

One of the most essential aspects of Bubble Eye Goldfish care is creating a safe and appropriate habitat. Due to the delicate bubbles that protrude from their eyes, these fish require a tank with plenty of open space and minimal decorations that could damage their bubbles. A soft substrate, such as sand or fine gravel, is recommended to prevent injury to their delicate fins.

In addition to a proper environment, Bubble Eye Goldfish require strict water conditions to remain healthy. They are sensitive to water chemistry and temperature changes, so frequent water testing and maintenance are crucial.

Feeding Bubble Eye Goldfish is also a critical aspect of their care. You should feed them a varied diet of high-quality pellets, flakes, and live or frozen foods.

Overall, Bubble Eye Goldfish care requires patience, attention to detail, and a willingness to provide a specialized environment. These unique fish can live a healthy and happy life with proper care.

Tank Size

A suitable environment for Bubble Eye Goldfish requires a tank size of at least 10 gallons, allowing for proper swimming space and water filtration to maintain their delicate eye sacs.

When setting up the tank, it is crucial to consider the type of decorations used, as rough or sharp objects can easily damage the bubbles. Smooth substrates, such as sand or rounded gravel, should also avoid punctures or tears. Additionally, under-gravel filtration is preferred for this species, providing a gentle and consistent water flow without disturbing the bubbles.

Regular water changes of at least 25% should be done weekly to maintain good water quality.

Water Parameters

Bubble Eye Goldfish are like other Goldfish in that they prefer cold-water environments. They’re not fond of warmer temperatures like many tropical species, so keep their water relatively cool.

These little fishies love their water to be neutral, clean, and balanced. Changing out a quarter of their water every week is essential to keep them healthy and happy. Bubble Eye Goldfish are especially sensitive to poor water conditions, so don’t skimp on this step!

To keep ammonia and nitrate levels low, ensure you have an effective filtration system. And when it comes to water temperature, aim for somewhere between 65°F to 80°F, with around 72°F being the sweet spot. As for pH levels, 6.0 to 8.0 is the range you want to aim for, with water hardness falling between 5 to 19 dKH.

Setting Up Their Tank

Properly setting up the aquarium for Bubble Eye Goldfish ensures their long-term health and well-being.

The first step in setting up their tank is choosing the right aquarium decor. Smooth substrate and decorations are necessary to prevent any damage to the delicate bubbles.

If you want to add, some live plants like Anacharis or Java fern can do just the trick! Not only do they look great, but they also oxygenate the water, creating a healthier environment for your fishy friends.

But be warned, some of these fish have a bit of a green appetite. They tend to munch on and uproot plants, so it’s essential to exercise caution when introducing them.

Filtration options are essential when setting up a Bubble Eye Goldfish tank. Under-gravel filtration is preferred as it removes waste and debris while providing oxygen to the tank. Aeration is also necessary to ensure proper oxygen levels in the water.

Lighting requirements for Bubble Eye Goldfish are minimal, and natural light is sufficient.

Water testing kits should be used regularly to monitor the levels of ammonia, nitrite, nitrate, and pH in the water. Regular water changes are also crucial in maintaining proper water parameters for the fish.

Overall, a properly set up and maintained aquarium is essential to ensure the longevity and health of Bubble Eye Goldfish.

Potential Diseases

Bubble Eye Goldfish are like any other freshwater fish and can be prone to diseases such as Ich, Dropsy, Swim Bladder Disease, Skin Flukes, and more. If left untreated, they may even start to turn white or black.

However, maintaining good water conditions can easily prevent most of these ailments. If one of your Goldfish falls ill, quarantining them for treatment can prevent the spread of disease to other fish in the tank.

One unique issue to watch out for with Bubble Eye Goldfish is the risk of bacterial infections if their sacs are ruptured. When exposed to water, the sensitive inner lining of their sac makes them more susceptible to disease. That’s why ensuring that no sharp objects in your tank could cause injury is crucial.

In summary, taking good care of your Bubble Eye Goldfish by monitoring water conditions and preventing injury can help keep them healthy and happy.

Food & Diet

Bubble Eye Goldfish are not picky eaters. They’ll eat anything you give them! However, high-quality flakes are their favorite. They love sinking pellets because they tend to gulp in the air when they eat floating flakes.

If you want to treat your Bubble Eye Goldfish, give them some daphnia, bloodworms, tubifex worms, or brine shrimp. These fish love some protein in their diet.

Bubble Eye Goldfish are scavengers and enjoy searching for food in the aquarium. A good way to please their scavenging behavior is by dropping some fruits and vegetables in the tank.

Be patient when feeding your Bubble Eye Goldfish. They are not the fastest swimmers, so they can’t always gobble food as quickly as other fish. Feed them several times daily, preferably two to four times, to ensure they get all the necessary nutrients.

Behavior & Temperament

These fish are known for their relaxed temperament and peaceful nature, making them suitable tank mates for other gentle species. However, they can become stressed in certain situations, such as when their bubbles get popped or when they are kept in a tank with aggressive or boisterous fish.

Personality traits of Bubble Eye Goldfish can vary from fish to fish, but they generally exhibit curious and playful behaviors. They enjoy exploring their environment and the decorations in their tank.

Providing a stress-free environment with plenty of enrichment can help Bubble Eye Goldfish thrive and exhibit their unique personalities.

Tank Mates

When selecting tank mates for Bubble Eye Goldfish, it is essential to choose gentle species not prone to aggression or boisterous behavior. Goldfish are peaceful creatures and prefer to swim with other peaceful fish.

Some good options for tank mates include other fancy goldfish varieties, such as the Black Moor, Celestial, or Lionhead. These fish have similar care requirements and are compatible with Bubble Eye Goldfish regarding temperament.

However, it is crucial to consider compatibility factors when choosing companions for Bubble Eye Goldfish. For instance, fish that are too small may become prey, while larger fish may accidentally injure the delicate bubbles on the Bubble Eye Goldfish.

Additionally, some species are known to be aggressive or territorial, and they may threaten the Bubble Eye Goldfish. Therefore, it is crucial to research potential conflicts and alternative options when selecting tank mates for these unique fish.

Overall, Bubble Eye Goldfish have a social behavior and can coexist peacefully with other fish if carefully selected and properly introduced.



Breeding Bubble Eye Goldfish requires a separate breeding tank and soft plants or breeding mops to provide a suitable environment for spawning, which can take several hours.

Choosing healthy and mature breeding pairs, with a male and a female, is essential. The female is typically rounder and has a wider belly than the male.

The female fish will start to move and groove, shaking and gyrating until she releases her eggs. Once the eggs are out, the male fish works quickly, fertilizing them. The eggs will then stick to plants or a breeding mop, ready to start their journey.

Depending on the size of your fish group, you may end up with a ton of eggs! The whole process can take hours, but the reward is worth it. Once all the fish have laid their eggs, removing them from the breeding tank is time. The eggs will take 4 to 7 days to hatch, so be patient.

Now comes the fun part – watching the baby fry grow up! They’ll start as dark brown, but their color will change as they age.

To feed them, you can use infusoria and other powdered foods until they’re ready for flakes. Keep an eye out for their iconic eye sacs, which usually start developing around the 6-month.

Breeding fish can be a fascinating and rewarding experience. With a little patience and care, you can witness the miracle of life right in your aquarium.

Frequently Asked Questions

Are Bubble Eye Goldfish easy to take care of for beginners?

Bubble Eye Goldfish require specialized care and can be susceptible to various health issues. Proper water quality, feeding frequency, and tank size are key to overall maintenance. They may not be suitable for beginner fish keepers.

What is the ideal water temperature for Bubble Eye Goldfish?

Maintaining the ideal water temperature for Bubble Eye Goldfish is crucial for their health. The ideal range is between 65-80°F.

Can Bubble Eye Goldfish live in a community tank with other fish species?

Bubble Eye Goldfish can coexist peacefully in a community tank with other species with similar physical challenges. Choosing peaceful tank mates that won’t bully or compete with the Bubble Eye Goldfish for food or space is important.

Can a Bubble Eye Goldfish survive without its eye sacs?

Maintaining the eye sacs of Bubble Eye Goldfish is crucial as they play a vital role in their vision and buoyancy control. These sacs are essential for their survival; without them, the fish cannot thrive or survive.

How long does it take for Bubble Eye Goldfish fry to reach maturity?

Bubble Eye Goldfish fry reaches maturity at around 6-9 months.


In conclusion, Bubble Eye Goldfish are truly fascinating and unique freshwater fish that require specialized care.

Keeping them in a suitable environment, providing a balanced diet, and monitoring their health is crucial to their well-being. As with any living creature, it is essential to approach their care with responsibility and respect.

Furthermore, it is important to consider the compatibility of Bubble Eye Goldfish with other fish species in a community tank. Choosing suitable tank mates can create a peaceful and harmonious environment for all inhabitants.

With proper care and attention, Bubble Eye Goldfish can live a long and healthy life, providing endless enjoyment and fascination for aquarium enthusiasts.