Bubble Eye Goldfish (Care Guide)

unusual goldfish with bubbles

The Bubble Eye Goldfish is a type of Fancy Goldfish known for its unique fluid-filled sacs under its eyes. It requires careful attention to thrive in an aquarium.

This breed has a calm nature but needs a safe and healthy environment due to its sensitive eye sacs. Owners must balance the fish’s needs with the challenges of proper care.

Success in keeping a Bubble Eye Goldfish brings satisfaction to the aquarist.

General Characteristics

The Bubble Eye Goldfish is identifiable by its missing dorsal fin and large sacs under its eyes. They live 5 to 10 years and grow to 3 to 4 inches as adults.

This breed comes in various colors and patterns, appealing to aquarists and breeders.


Bubble Eye goldfish are recognized by their unique fluid-filled sacs below their eyes, which lack a dorsal fin and have double tails. These sacs, which give their eyes a delicate look, start to form three months after they hatch.

Bubble Eye goldfish typically grow to 3 to 4 inches in length and move smoothly in the water, their double tails spreading out. Through selective breeding, various body shapes, scale types, and eye sac numbers have been developed, including some with four sacs.

Their colors vary, including red, white, and calico, and they are often displayed in aquariums with smooth rock backdrops.


Bubble Eye Goldfish have unique eye sacs and bright colors, attracting many hobbyists. They can live 10 to 15 years, which means owners need to know how to care for them properly. A full lifespan requires careful attention to water quality and diet.

Their eye sacs can easily get injured or infected, so they need a safe tank with calm tank mates. It’s important to change the water regularly to keep the tank clean and avoid health problems. For space to move and grow, a tank of at least 20 gallons is recommended.

The well-being of Bubble Eye Goldfish depends on a consistent and supportive environment.


Bubble Eye goldfish are small, typically reaching 3 to 4 inches in length. They lack a dorsal fin and have prominent, fluid-filled eye sacs. Their egg-shaped body, a consequence of selective breeding, and the eye sacs can affect their swimming ability.

Their eye sacs are fragile, so they need a carefully arranged tank to prevent injuries. They grow up to about 5 inches, making them suitable for smaller tanks.

Their compact size and calm nature make them an appealing addition to a well-kept aquarium.

Aquarium Preparation

To ensure the health of Bubble Eye Goldfish, it is essential to set up the right aquarium.

Choose a tank size that fits their needs and arrange equipment and decorations to suit their poor eyesight and fragile eye sacs.

Plan and create an environment that is safe for them.

Tank Size

A 20-gallon tank size is recommended for Bubble Eye goldfish due to their specialized swimming needs and fragile eye sacs. For these fish, it’s important to ensure a gentle water flow in the tank to prevent stress or damage to their eyes.

An effective filtration system is necessary to maintain cleanliness and prevent bacterial infections, particularly if an eye sac bursts.

When adding live plants, select those without sharp edges to safeguard the fish. A medium-sized gravel substrate is advised as it’s safe for the Bubble Eye’s delicate features and enhances the tank’s appearance.

Tank Equipment And Decorations

To protect the delicate eye sacs of Bubble Eye Goldfish, the aquarium setup must include only smooth-edged decorations and safe equipment. Key points for tank setup are as follows:

  1. Use only decorations that are smooth and have no sharp edges. Incorporate soft plants and ornaments that are rounded to avoid injuring the eye sacs or dorsal fin when the fish are active.
  2. Select a filtration system with a gentle intake to prevent the fish from being pulled against it, which is important for both water quality and the safety of the fish.
  3. When selecting tank mates, choose breeds such as black moors or celestial goldfish that are non-aggressive and have similar swimming capabilities, especially if they will be in a different tank.

Maintenance and Health

To maintain Bubble Eye Goldfish health, there are a few key steps you should follow:

  1. Monitor their habitat and food regularly. This includes checking water quality often to ensure it is clean and free from harmful substances. Regularly cleaning the tank is also important to prevent diseases that can arise from bad conditions.
  2. Provide a diet that meets their specific nutritional requirements. Bubble Eye Goldfish have specific dietary needs, so it is important to feed them a balanced diet that includes a variety of foods. Make sure to provide them with a mix of pellet or flake food, as well as fresh vegetables and occasional treats.


A balanced diet for Bubble Eye goldfish should include high-quality flakes and sinking pellets to ensure health and meet their specific needs. Proper feeding allows them to get essential nutrients without exerting extra energy searching for food.

Consider the following dietary tips:

  1. Add high-protein snacks such as brine shrimp and tubifex worms to their diet for nutritional benefits.
  2. Provide small-sized fry foods for young Bubble Eye goldfish.
  3. To prevent Bubble Eye goldfish from being outcompeted during feeding by faster fish, allow enough time for them to consume their food properly.

Water Parameters

Caring for Bubble Eye Goldfish requires attention to water quality to ensure their health. A well-maintained aquarium with precise water parameters is essential. Temperature and pH must be regularly monitored due to the high waste production of these fish, which impacts water clarity. Effective biological filtration is crucial for waste management and oxygenation. Regular water changes are necessary to control ammonia and nitrite levels, which can be harmful.

ParameterIdeal RangeNotes
Temperature65-72°FMaintain stable conditions
pH Level7.2-7.6Prefer slightly alkaline water
Ammonia0 ppmAvoid any presence, as it’s toxic
Nitrite0 ppmKeep undetectable to ensure safety
Water Changes25-33% weeklyImportant for waste removal and mineral replenishment

Tank Maintenance for Bubble Eye Goldfish

It’s crucial to maintain a clean tank for the health and safety of Bubble Eye Goldfish. This involves frequent water changes and choosing aquarium decor that won’t damage their eye sacs. These fish have delicate sacs that can be easily harmed by sharp objects or rough surfaces. Maintenance should be performed carefully to prevent damage, particularly when uprooting plants or cleaning.

It’s recommended to house Bubble Eye Goldfish with other gentle breeds to prevent stress and avoid potential harm due to their poor vision.

Common Diseases

Bubble Eye Goldfish are susceptible to several health conditions, such as Ich, Dropsy, and Swim Bladder Disease. Consistent care and preventative measures are crucial for their health. Their distinctive eye structures are prone to infection, particularly if a bubble bursts, increasing the risk of bacterial infections.

  1. Ich (White Spot Disease): The fish develops small, white spots on its body and may swim more slowly due to discomfort.
  2. Dropsy: This condition causes the fish to swell and its scales to stick out. It often indicates kidney failure or infection.
  3. Swim Bladder Disease: Affected fish have trouble controlling their buoyancy, which makes swimming difficult.

In breeding tanks, it is important to monitor the adult fish since they may consume their eggs, and stress can heighten their vulnerability to diseases.

Personality Traits

Bubble Eye goldfish are peaceful and suitable for calm community aquariums. They get along well with other non-aggressive fish like the Celestial Eye Goldfish. They have a range of behaviors, from shy to curious.

Bubble Eye Goldfish require special care due to their eye sacs, which can limit vision and make them prone to injury. Their tanks should be free from sharp objects and rough decorations. Their swimming is slow due to their eye sacs and long fins, affecting breeding and care.

Some Bubble Eye Goldfish may hide while others are more active. They show individual personalities, which is not common for fish. They need careful feeding since they are slow swimmers and might not compete well for food.

With proper care, Bubble Eye Goldfish can thrive and show a variety of behaviors, making them enjoyable pets.

Compatible Aquarium Companions

Selecting compatible tank mates for Bubble Eye Goldfish is essential due to their delicate eye sacs. It’s important to choose tank mates that minimize the risk of injury and promote a peaceful environment.

Here are three key considerations for selecting tank mates for Bubble Eye Goldfish:

  1. Pair with Other Handicapped Goldfish: It’s beneficial to house Bubble Eye Goldfish with goldfish that have similar physical limitations. Suitable companions include: Telescope Goldfish, which have protruding eyes and impaired vision. Lionhead Goldfish, which lack a dorsal fin and have limited mobility. Celestial Eye Goldfish, which have upward-facing eyes and move slowly.
  2. Choose Non-Aggressive Companions: Gentle fish make good tank mates. Examples include: Black Moors, a type of gentle telescope goldfish. Demekins, which are round-bodied and resemble telescope goldfish. Freshwater Snails, which live peacefully with goldfish and help maintain tank cleanliness.

Avoid Aggressive or Energetic Fish: To protect the Bubble Eye Goldfish’s eye sacs, do not place them with:

  • Fast-swimming goldfish that might collide with Bubble Eye Goldfish.
  • Aggressive fish that may target the eye sacs.
  • Highly active fish that could outcompete them for food or cause stress.

Reproduction Techniques

Breeding Bubble Eye Goldfish requires attention to their sensitive traits for successful and safe spawning. These goldfish are prolific breeders when conditions are right. Their fluid-filled sacs are prone to damage during breeding.

Mating Bubble Eye Goldfish is difficult until they reach breeding condition. Males develop breeding tubercles, and females grow rounder with eggs. Breeders mimic natural seasonal changes to stimulate spawning, reflecting their origins in China.

For breeding, a separate tank with fine-leaved plants or spawning mops is needed for egg depositing. Adults should be removed post-spawning to protect the eggs from being eaten, a common goldfish behavior.

Bubble Eye Goldfish, part of Carassius auratus gibelio, are rarely bred with other fancy varieties like Celestial goldfish to preserve distinct traits. They are valued for their unique appearance.

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