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HomeFreshwater FishBubble Eye Goldfish: A Brief Overview (Size, Care & Breeding)

Bubble Eye Goldfish: A Brief Overview (Size, Care & Breeding)

Are you the proud owner of Bubble Eye Goldfish, or perhaps you’re considering welcoming these captivating aquatic companions into your life? Do you find yourself pondering questions like, “How can I ensure the longevity of my Bubble Eye Goldfish?” or “What are the ideal tank mates for these charming fish?” Whether you’re seeking guidance on their care, behavior, breeding, or simply want to unlock the secrets to a thriving aquarium, you’ve come to the right place.

Dive into our blog on “Bubble Eye Goldfish: Your Ultimate Guide,” where we’ll unravel the mysteries of these enchanting underwater wonders and provide expert insights to make your aquatic journey a resounding success. Join us as we explore the fascinating world of Bubble Eye Goldfish and embark on an educational adventure to ensure the well-being of these delightful aquatic companions.

Longevity and factors affecting the lifespan of bubble eye goldfish 

Bubble Eye Goldfish are truly fascinating aquatic companions with a potential lifespan of 10 to 15 years, making them stand out in the freshwater fish world.

Ensuring clean and stable water conditions is paramount. Goldfish, including Bubble Eyes, are particularly sensitive to water quality. Regular water changes, use of a good filtration system, and monitoring water parameters like ammonia, nitrites, and nitrates are vital. Bubble eye goldfish popped eyes are especially sensitive, making it even more crucial to maintain pristine water conditions. Maintain a consistent temperature within the recommended range for goldfish, which is usually around 68-74°F or 20-23°C.

Life expectancy and influencing factors
Life expectancy and influencing factors

Feed your Bubble Eye Goldfish a high-quality pellet or flake food designed for goldfish. Supplement their diet with occasional treats like freeze-dried or live foods such as brine shrimp and bloodworms. Overfeeding should be avoided, as it can lead to health problems.

Goldfish, including Bubble Eyes, thrive in spacious environments. Ensure your aquarium is adequately sized to accommodate the growth and movement of your fish. As a general rule, allow 20 gallons of water per adult goldfish.

Bubble Eye Goldfish are generally peaceful, but it’s essential to ensure they are housed with compatible tankmates. Avoid aggressive or fin-nipping species that may stress or harm your Bubble Eyes.

Routine aquarium maintenance is key to a healthy fish environment. This includes cleaning the substrate, checking and replacing filter media when necessary, and maintaining a stable water chemistry.

Keep in mind that Bubble Eye Goldfish have delicate eye sacs, which are prone to injury. Carefully choose decorations and tank ornaments to prevent any sharp edges or objects that could harm their eyes.

Regularly observe your Bubble Eye Goldfish for any signs of illness, such as changes in behavior, appetite, or appearance.

Appearance of Bubble Eye Goldfish

The most distinguishing feature of Bubble Eye Goldfish is undoubtedly the sacs beneath their eyes. These sacs, often mistaken for holding air, actually contain fluids. As these fish swim, the fluid within the sacs creates a mesmerizing jiggling effect. Interestingly, some scientists have explored the idea that the fluid within these sacs might have properties that could stimulate human cell growth.

However, it’s crucial to handle these sacs with care, as they are as delicate as they appear. They can be easily punctured or deflated, but the good news is that they possess the ability to heal on their own and refill with fluids. Yet, it’s important to note that the regrown sacs may not return to their original size, potentially causing an imbalanced appearance. The size of these sacs can vary from one specimen to another, ranging from manageable to quite large, which can hinder swimming.

Appearance of Bubble Eye Goldfish
Appearance of Bubble Eye Goldfish

Additionally, these sacs have an impact on the fish’s vision. Positioned directly beneath the eyes, which point upward, the bulbous shape of the sacs and their orientation make it challenging for the fish to see where they are headed.

Bubble Eye Goldfish have a distinctive absence of a dorsal fin, giving their backs a smooth appearance. While this may lead to some swimming difficulties, they compensate for it with a double tail. The tailfin splits into four points and is relatively long, aiding in maintaining balance.

These fish exhibit a round, egg-shaped body. They possess pectoral fins and an anal fin, although their unique body shape can somewhat limit their mobility.

Bubble Eye Goldfish come in a wide array of colors. You’ll find specimens in solid gold, orange, red, brown, or white, while others may display multiple colors. Some have red and white spots, red and black spots, or exhibit a captivating calico pattern created by various colors.

Distinguishing the gender of Bubble Eye Goldfish can be challenging in younger fish. It’s only when they mature into adults, ready for breeding, that gender differences become more apparent. Females tend to develop a plumper shape, while males often develop small tubercles on their heads.

Size of Bubble Eye Goldfish

When fully mature, Bubble Eye Goldfish typically reach an average size of around 5 inches in length, setting them apart from some other Goldfish species that continue to grow. This distinctive trait makes them an ideal choice for aquarists who prefer to keep their fish in smaller aquariums.

Size of Bubble Eye Goldfish
Size of Bubble Eye Goldfish

Bubble Eye Goldfish Care

Let’s break down the key aspects of caring for Bubble Eye Goldfish, including tank size, water parameters, setting up their habitat, and common diseases: 

Tank Size for Bubble Eye Goldfish

The minimum tank size for a single Bubble Eye Goldfish should be at least 10 gallons.

Ideally, aim for a 20-gallon tank if possible, as this provides more space, which is appreciated by these less agile swimmers.

If you plan to keep multiple Bubble Eye Goldfish together, allocate 10 gallons of space for each specimen.

Avoid keeping Bubble Eye Goldfish in small bowls, as they require more room to thrive and produce a significant amount of waste that can negatively impact water quality.

Water Parameters for Bubble Eye Goldfish

Bubble Eye Goldfish are cold-water fish, and they do not tolerate higher temperatures typical of tropical species.

Maintain relatively neutral water that is clean and balanced.

Water Parameters for Bubble Eye Goldfish
Water Parameters for Bubble Eye Goldfish

Regular water changes are crucial, with a recommendation of replacing approximately a quarter of the water every week to keep ammonia and nitrate levels low.

Effective filtration is essential to maintain water quality.

  • Temperature: 65°F to 80°F (around 72°F is ideal)
  • pH levels: 6.0 to 8.0
  • Water hardness: 5 to 19 dKH

Setting Up a Tank for Bubble Eye Goldfish

Carefully plan the habitat for Bubble Eye Goldfish, taking into account the delicacy of the fluid-filled sacs beneath their eyes.

Use medium-sized gravel as a substrate, ensuring it is relatively smooth since these fish may scavenge the bottom of the tank.

Decorate the tank with smooth rocks and plastic decorations, avoiding any rough or jagged surfaces.

Consider incorporating live plants like Anacharis or Java fern, but be aware that Bubble Eye Goldfish may eat or uproot them.

Setting Up Tank Bubble Eye Goldfish
Setting Up Tank Bubble Eye Goldfish

Artificial plants are a safer alternative, but opt for silk faux plants instead of plastic ones, which can be rough and pointy.

Choose an appropriate filtration system. Be cautious with powerful filter uptake valves that can harm the fish’s delicate sacs.

Consider using an under-gravel filtration system, which is the preferred method for Bubble Eye Goldfish and minimizes exposure to potential dangers.

Common Diseases of Bubble Eye Goldfish

Bubble Eye Goldfish are susceptible to common freshwater fish diseases like Ich, Dropsy, Swim Bladder Disease, and Skin Flukes, among others.

Maintaining good water conditions can prevent many of these diseases.

If a disease does occur, promptly quarantine the affected fish for treatment to prevent its spread.

Note that Bubble Eye Goldfish face an increased risk of bacterial infections if their sacs are ruptured. Therefore, it’s crucial to ensure the tank environment is free from objects that could cause injury.

Food and Diet for Bubble Eye Goldfish

As omnivores, Bubble Eye Goldfish have a versatile appetite and will readily consume a variety of foods.

High-quality flakes specifically designed for goldfish are suitable for their daily diet. However, consider using sinking pellets instead of floating flakes. These fish are known to ingest a significant amount of air while eating, and sinking pellets can help reduce this issue.

Food and Diet for Bubble Eye Goldfish
Food and Diet for Bubble Eye Goldfish

While flakes and pellets make up the staple diet, it’s beneficial to provide occasional protein-rich treats. Options include daphnia, bloodworms, tubifex worms, and brine shrimp. These protein sources contribute to their overall health and vitality.

Bubble Eye Goldfish also exhibit scavenging behavior and enjoy foraging for small particles in the aquarium substrate. To cater to this natural behavior, you can introduce small pieces of fruits and vegetables, such as blanched peas or cucumber slices, into the tank as supplementary snacks.

Behavior and Temperament of Bubble Eye Goldfish

Bubble Eye Goldfish are renowned for their calm and gentle temperament, making them an excellent choice for aquarists seeking peaceful fish companions.

They are highly compatible with other peaceful fish species, and you can even keep them in a community aquarium setting without concerns of aggression or territorial behavior.

Bubble Eye Goldfish are known for their non-aggressive nature, to the extent that they won’t even bother snails in the tank.

Throughout the day, these fish exhibit a relaxed and leisurely swimming pattern. They gracefully glide around the aquarium, particularly in search of food.

Their exploration takes them to various parts of the tank, including the bottom area, where they may scavenge for food or swim among plant leaves.

It’s important to note that Bubble Eye Goldfish do not exhibit rapid or darting movements within the tank. Their unique body shape, featuring large eye bubbles and the absence of a dorsal fin, results in a relatively slow and deliberate swimming style.

Suitable Tank Mates for Bubble Eye Goldfish 

Finding compatible tank mates for Bubble Eye Goldfish can be a bit challenging due to their distinctive features and slow swimming style.

Bubble Eye Goldfish have delicate eye sacs that can be easily damaged. Therefore, it’s crucial to avoid aggressive fish species or those that might playfully nip at them.

Bubble Eye Goldfish are not fast swimmers and may struggle to compete for food with faster, more agile fish. This makes it essential to choose tank mates that won’t outcompete them during feeding.

Tank Mates for Bubble Eye Goldfish 
Tank Mates for Bubble Eye Goldfish

Preference for Similar Handicaps: When creating a community tank, it’s a good idea to select fish with similar swimming handicaps to ensure that all tank inhabitants have an equal chance at getting food.

Bubble Eye Goldfish tend to do well in groups of their own kind. If you want to include other fish species, consider those that have similar characteristics and care requirements.

Some Suitable Tank Mates for Bubble Eye Goldfish:

  • Telescope Goldfish: These goldfish share a similar body shape and swimming style with Bubble Eye Goldfish, making them suitable companions.
  • Celestial Goldfish: Celestial Goldfish, known for their upward-facing eyes, are another great choice due to their calm temperament and similar swimming patterns.
  • Black Moor Goldfish: Black Moors, with their distinctive black coloration and slower swimming, are compatible tank mates for Bubble Eye Goldfish.
  • Lionhead Goldfish: Lionhead Goldfish, recognized for their prominent head growth, are peaceful and relatively slow-moving, making them compatible companions.

Breeding Bubble Eye Goldfish

Bubble Eye Goldfish are quite eager to breed, and they can be bred in groups without the need to distinguish between males and females. The distinctive features of Bubble Eye Goldfish make it challenging to differentiate between males and females, making group breeding a simpler option.

To initiate breeding, it’s advisable to set up a separate breeding tank. This tank should be equipped with soft plants or breeding mops where the eggs can adhere and be protected from the adults, who may attempt to eat them.

Begin by adjusting the temperature of the breeding tank. Start at around 60 degrees Fahrenheit (15°C) and then gradually increase it by approximately 3 degrees Fahrenheit (1.5°C) each day. The ideal temperature range for spawning is typically between 68 to 74 degrees Fahrenheit (20 to 23°C).

Breeding Bubble Eye Goldfish
Breeding Bubble Eye Goldfish

As the temperature reaches the suitable range, you’ll observe males chasing females around the tank. The female will eventually release her eggs, and the male will promptly fertilize them. The adhesive nature of the eggs causes them to stick to the plants or breeding mop.

The spawning process can take several hours, depending on the number of fish in the group. You may end up with a substantial number of eggs.

Once all the fish have spawned, it’s essential to remove the adult fish from the breeding tank to prevent them from consuming the eggs.

The eggs will take between 4 to 7 days to hatch. Initially, the baby fry will appear dark brown in color, but their appearance will change as they grow. At this stage, you can feed them infusoria and powdered foods until they are ready to transition to flakes.

It’s important to note that the distinctive eye sacs, characteristic of Bubble Eye Goldfish, will begin to develop at around 6 months of age in the fry.


In conclusion, we’ve delved deep into the captivating world of Bubble Eye Goldfish, uncovering their unique features, care requirements, ideal tank mates, breeding secrets, and so much more. We hope this comprehensive guide has enriched your understanding and kindled your passion for these enchanting aquatic companions.

Here at Dry Wash Aquarium, we’re your go-to resource for everything aquatic. Our commitment is to provide you with valuable insights and expert advice, ensuring both the well-being of your Bubble Eye Goldfish and the success of all your aquatic endeavors. Stay tuned for more fascinating articles, tips, and tricks to enhance your aquarium experience. Your aquatic adventure awaits!

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Mark Senske
Mark Senske
Mark Senske is a highly regarded expert in freshwater and marine aquascaping, specializing in creating captivating and visually striking aquariums. With his extensive knowledge and experience, he excels in designing and maintaining beautiful aquatic environments that showcase the natural beauty of fish and plants.


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