The Butterfly Fancy Goldfish – What You Should Know - "File:Calico-butterfly-tail-demekin.png" by Syberspace is licensed under CC BY-SA 3.0.
The Butterfly Fancy Goldfish – What You Should Know - "File:Calico-butterfly-tail-demekin.png" by Syberspace is licensed under CC BY-SA 3.0.


The butterfly fancy goldfish, known for its graceful appearance and striking aesthetics, is a captivating addition to both aquariums. With its unique butterfly-like fins, vibrant coloration, and peaceful demeanor, this particular goldfish variety has earned a special place in the hearts of fish enthusiasts. Setting up an aquarium for butterfly fancy goldfish requires careful planning and attention to their specific needs to ensure their well-being and to showcase their beauty to its fullest extent. In this guide, we will walk you through the essential steps and considerations for creating an ideal habitat for these elegant fish, enabling you to provide them with a comfortable and visually appealing environment. From tank selection to water parameters, feeding, and maintenance, we will cover all aspects of creating a thriving ecosystem for your butterfly fancy goldfish. So, let’s dive into the world of these graceful aquatic companions and learn how to set up the perfect aquarium to accommodate their unique needs and characteristics.

Appearance and Behavior


  • Butterfly Fins: The butterfly fancy goldfish, or butterfly tail goldfish, is known for its graceful, elongated, and delicate butterfly-shaped fins. These fins are typically longer and more pronounced compared to other goldfish varieties, resembling the wings of a butterfly.
  • Color Variety: Butterfly fancy goldfish are available in a wide range of vibrant colors, including red, orange, white, yellow, and black. Their scales may exhibit a pearlescent quality, giving them a shimmering appearance.
  • Two-Tone Coloration: A distinctive characteristic of the butterfly fancy goldfish is their two-tone coloration. The upper part of their body often displays a darker color, while the lower part is lighter, creating a striking contrast and enhancing their beauty.
  • Elongated Body: These goldfish have an elongated and streamlined body, contributing to their graceful appearance. Their bodies are sleek and elegant, with a long, flowing tail fin.
  • Double Tail: Butterfly fancy goldfish frequently possess a double tail, meaning their caudal fin is split into two lobes, further adding to their overall elegance.


  • Peaceful Nature: Butterfly fancy goldfish are renowned for their calm and peaceful behavior. They are social fish and can be kept in community aquariums with other goldfish varieties, provided the environment is adequately sized.
  • Foraging Habits: These goldfish are omnivorous and enjoy foraging for food at the bottom of the water. They will thrive on a diet of high-quality fish pellets, flakes, and live or frozen foods like brine shrimp and bloodworms.
  • Lively Swimmers: Despite their long, flowing fins, butterfly fancy goldfish are agile swimmers. They can navigate the water with ease, and their finnage adds to their overall grace as they move through the tank or pond.
  • Aesthetic Value: Due to their striking appearance, butterfly fancy goldfish are often chosen for their ornamental value in both aquariums and garden ponds. Their beauty adds a touch of elegance to aquatic environments.

The butterfly fancy goldfish is a captivating and elegant addition to both aquariums. Their unique butterfly-like fins, striking coloration, and peaceful demeanor make them a favorite among goldfish enthusiasts, and their adaptability to different aquatic environments adds to their charm. When properly cared for, these goldfish can be a delightful and eye-catching centerpiece in various aquatic settings.

The Butterfly Fancy Goldfish – What You Should Know - "File:Calico-butterfly-tail-demekin.png" by Syberspace is licensed under CC BY-SA 3.0.
The Butterfly Fancy Goldfish – What You Should Know – “File:Calico-butterfly-tail-demekin.png” by Syberspace is licensed under CC BY-SA 3.0.

Aquarium Setup

Setting up an aquarium for butterfly fancy goldfish requires careful planning to ensure their well-being and to showcase their beauty. Here are the steps to set up an aquarium for these graceful fish:

  • Select the Right Tank: Choose a tank that is spacious enough to accommodate the size of your goldfish. Butterfly fancy goldfish can grow relatively large, so a tank size of 20 gallons (80 liters) per fish is recommended. However, this of course depends on the size of your fish, so use your own sound judgement as well.
  • Filtration and Aeration: Invest in a quality filtration system that can handle the waste produced by goldfish. Goldfish are known for producing a lot of waste, so a strong filter is essential. Aeration is crucial to maintain oxygen levels in the water, as goldfish require well-oxygenated water.
  • Substrate and Decor: Use a fine, smooth substrate such as sand or small, rounded gravel. Avoid rough or sharp-edged substrates that could damage their delicate fins. Provide hiding spots and decorations, such as caves, driftwood, and aquatic plants. Goldfish like to explore and may appreciate some hiding places.
  • Water Parameters: Maintain a stable water temperature in the range of 68-74°F (20-23°C). Goldfish are cold-water fish, and these temperatures suit them well. Keep water quality pristine. Perform regular water changes (about 10-20% every 1-2 weeks) and monitor water parameters for ammonia, nitrites, and nitrates to ensure they remain within safe levels.
  • Lighting: Butterfly fancy goldfish do not require intense lighting. Use subdued, indirect lighting to prevent excessive algae growth. A 12-hour light-dark cycle is typically sufficient.
  • Diet: Feed them a balanced diet of high-quality goldfish pellets, flakes, and occasionally offer live or frozen foods like brine shrimp or bloodworms. Be mindful not to overfeed, as overeating can lead to health issues.
  • Water Circulation: Ensure there’s gentle water movement to prevent stagnant areas in the tank. Goldfish are not strong swimmers, so avoid strong currents.
  • Tank Mates: Choose tank mates carefully. Butterfly fancy goldfish are generally peaceful but can be competitive for food. Avoid aggressive or fin-nipping species, and consider keeping them with other goldfish of similar size.
  • Quarantine New Fish: Quarantine new fish for at least a few weeks before adding them to the main tank to prevent the introduction of diseases.
  • Regular Maintenance: Perform regular maintenance, including water changes, filter cleaning, and monitoring water parameters. Butterfly fancy goldfish thrive in a clean and stable environment.
  • Observe and Enjoy: Spend time observing and enjoying the beauty of your butterfly fancy goldfish. They are fascinating to watch as they gracefully swim and display their unique finnage.

By following these guidelines and providing the right environment, you can create a suitable and visually appealing aquarium for your butterfly fancy goldfish, ensuring their health and happiness in captivity.


In conclusion, setting up an aquarium for butterfly fancy goldfish requires careful consideration of their specific needs and preferences. These elegant fish, with their unique butterfly-like fins and striking coloration, can thrive and flourish when provided with the right environment. To create an ideal aquarium for them, remember to:

  • Select an adequately sized tank with efficient filtration and aeration.
  • Use a suitable substrate and provide decorations and hiding spots.
  • Maintain stable water parameters, including temperature and water quality.
  • Provide appropriate lighting and gentle water circulation.
  • Offer a balanced diet and monitor feeding to prevent overeating.
  • Choose compatible tank mates and quarantine new additions.
  • Engage in regular maintenance to keep the tank clean and the water quality optimal.

By following these steps, you can create a beautiful and comfortable habitat for your butterfly fancy goldfish. As you observe their graceful movements and vibrant colors, you’ll not only provide them with a thriving environment but also enjoy the captivating beauty they bring to your aquarium. These fish are not only a source of visual delight but also a wonderful addition to the world of aquatic pets.