Bubble Eye Goldfish: The Complete Care Guide for Beginners and Pros Alike

Bubble Eye Goldfish is a fascinating and unique goldfish species that has captivated fish enthusiasts for centuries. These fish are known for their distinctive protruding eyes, which resemble large, fluid-filled bubbles on either side of their head.

Proper care for Bubble Eye Goldfish is essential to ensure that they thrive in a captive environment. As with any pet, understanding their diet, tank setup, and maintenance needs is essential. These delicate fish can become stressed, sick, or even die prematurely without proper care.

The purpose of this guide is to provide a comprehensive resource for caring for Bubble Eye Goldfish. I will cover everything you need to know, from tank setup to feeding and maintenance. Enjoy!

Characteristics of Bubble Eye Goldfish

Bubble Eye Goldfish are a unique and interesting variety of goldfish with several distinctive characteristics:

Physical Features

They are small, round-bodied fish that can grow up to 6 inches long. They have a distinct appearance, with two large fluid-filled sacs under their eyes that give them a unique look. These sacs are delicate and can rupture easily, so handling them with care is essential. Bubble Eye Goldfish come in various colors, including orange, red, white, and black.


Generally, these goldfish are peaceful and social fish that get along well with other fish of similar size and temperament. They are active swimmers and enjoy exploring their aquarium environment. They are also known for their curiosity and will often investigate any new additions to their tank, such as plants or decorations.


With proper care, Bubble Eye Goldfish can live in captivity for up to 10 years. Several factors can affect their lifespan, including water quality, diet, and overall health. It’s essential to provide your Bubble Eye Goldfish with a clean and healthy environment to ensure they live a long and healthy life.

Bubble Eye Goldfish Care Guide

Proper tank setup is essential to ensure the health and well-being of Bubble Eye Goldfish. Here are the key factors to consider when setting up a tank for your Bubble Eye Goldfish:

Tank Size and Shape

Bubble Eye Goldfish require a spacious tank to swim and grow comfortably. A minimum of 20 gallons is recommended for one or two Bubble Eye Goldfish and an additional 10 gallons for each additional fish.

The tank should be wider than it is tall, as Bubble Eye Goldfish are bottom dwellers and need ample swimming space.

Water Conditions

Clean and well-oxygenated water is needed for these fish. A pH level of 7.0 to 8.0 and a temperature range of 68°F to 72°F is ideal for their health. It is essential to avoid drastic water temperature changes and maintain consistent water parameters.

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Filtration and Aeration

Good filtration is essential to maintain water quality and prevent the buildup of harmful toxins. A filter should be capable of processing at least five times the tank volume per hour.  

Also, they require adequate aeration to ensure that there is enough oxygen in the water. An air pump and air stone can help to improve water circulation and increase oxygen levels.


These Goldfish do not require special lighting, but providing a consistent lighting schedule is vital. A light cycle of 12 hours on and 12 hours off is recommended to help regulate their internal clock and prevent stress. Also, avoid placing the tank in direct sunlight, which can lead to temperature fluctuations and algae growth.

Nutritional Needs

A diet that is too high in carbohydrates can lead to digestive issues and health problems. They require a balanced diet high in protein and low in carbohydrates. Always choose high-quality fish food that is specifically formulated for goldfish.

Frequency and Quantity of Feeding

Bubble Eye Goldfish should be fed small, frequent meals throughout the day. Overfeeding can lead to health problems such as swim bladder issues and obesity. A good rule of thumb is to feed your fish a small amount of food two to three times per day. The amount of food should be enough to be consumed within two to three minutes.

Recommended Food Types

Being omnivores, they require a mix of plant and animal-based foods in their diet. High-quality commercial fish pellets, flakes, or gel food are good options for a balanced diet.

Supplementing their diet with fresh or blanched vegetables such as peas, spinach, and zucchini can also provide essential vitamins and nutrients. Live or frozen foods such as brine shrimp and bloodworms can be offered as occasional treats.

How to Breed Bubble Eye Goldfish?

Breeding Bubble Eye Goldfish can be a rewarding experience for experienced fish keepers. Here are the key factors to consider when breeding Bubble Eye Goldfish:

Mating Behaviors

Bubble Eye Goldfish are egg layers and require a separate breeding tank for successful breeding. Males will typically chase and nudge the females to induce spawning. The female will release eggs, and the male will then fertilize them.

Caring For Eggs and Fry

After spawning, the eggs will attach to surfaces in the tank, such as plants or a breeding mop. Keeping the breeding tank clean and debris-free is vital to prevent fungus growth on the eggs.

The eggs will hatch within a few days, and the fry will absorb their yolk sacs for nourishment. After a few days, the fry will begin to swim and require small, frequent feedings of specialized food.

Read More  Goldfish Fungus: Types, Causes, And Effective Treatments

Tips for Successful Breeding

To increase the likelihood of successful breeding, ensure the breeding tank has a stable temperature and water parameters. Adding a breeding mop or other spawning surfaces can also encourage breeding behaviors.

Besides, separating the adult fish once spawning has occurred is crucial to prevent them from consuming the eggs or fry.

Common Health Issues Related To Bubble Eye Goldfish

Bubble Eye Goldfish can be prone to specific health issues like any other fish. It’s essential to be aware of these health issues and take steps to prevent them from occurring. Here are some of the most common health issues that Bubble Eye Goldfish may experience:

Swim Bladder Disorder

This is a condition when the fish has difficulty controlling its buoyancy. Symptoms include the fish swimming sideways, upside down, or struggling to stay at the bottom of the tank. This condition can be caused by overfeeding or poor water quality.

Fungal Infections

When the fish’s immune system is weakened, fungal infections can occur. This happens usually due to stress or poor water quality. Symptoms of fungal infections include white or gray patches on the fish’s skin or fins.

Bacterial Infections

Bacterial infections can occur when the fish’s immune system is weakened, often due to stress or poor water quality. Symptoms of bacterial infections include red spots or ulcers on the fish’s skin, frayed fins, or lethargy.


These tiny organisms can infect fish, causing a range of symptoms, including loss of appetite, lethargy, and skin irritations. Ich is a common parasite that affects many fish species, including Bubble Eye Goldfish.

Do Bubble Eye Goldfish Require Protein Skimmers for their Care?

Protein skimmers explained: Bubble Eye goldfish do not require protein skimmers for their care. These unique goldfish have delicate eye sacs that can be easily damaged by strong water currents created by protein skimmers. It is best to provide them with a well-maintained and clean aquarium environment, regular water changes, and a proper filtration system suitable for goldfish.


Bubble Eye Goldfish can be a great addition to your aquarium if you are looking for a unique and exciting fish. While they require special care, including a specific diet and a gentle water flow, they can provide a lot of joy and entertainment.

Following the tips and tricks mentioned in this guide will help you create a healthy and happy environment for your Bubble Eye Goldfish. Your Bubble Eye Goldfish can live a long and happy life in your aquarium with proper care and attention.

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