Description
The Red and Black Fantail is a striking variety of fancy goldfish known for its vibrant bicolour pattern and flowing double tail. Originating from selective breeding of the Prussian carp, this cold-water species is prized in ornamental aquatics for both its aesthetic appeal and manageable care requirements. While hardy, the Fantail’s ornamental features demand careful consideration in aquarium setup and maintenance to ensure longevity and health.
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Features of a Red and Black Fantail
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Rounded, egg-shaped body with a prominent dorsal hump
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Distinctive double caudal (tail) fin that is broad and flowing
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Colouration is a blend of bright red-orange and deep black
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Average adult size is 15–20 cm
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Lifespan ranges from 10 to 15 years with proper care
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Reduced swimming agility due to body shape and fin length
The Best Aquarium Size for Red and Black Fantail
A single Red and Black Fantail requires a minimum of 75 litres, with an additional 40 litres per additional fish. Due to their size and bioload, larger aquaria promote better health and water quality stability. Horizontal swimming space is more critical than vertical depth.
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Tank Mate Compatibility for Red and Black Fantail
The Red and Black Fantail thrives with other peaceful, slow-swimming freshwater species that tolerate cooler temperatures. Suitable tank mates include:
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White Cloud Mountain Minnow
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Weather Loach
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Rosy Barb
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Zebra Danio
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Apple Snail
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Other Fancy Goldfish (e.g. Ryukin, Oranda)
Diet for Red and Black Fantail
These omnivores benefit from a varied diet. Offer high-quality sinking goldfish pellets as a staple, supplemented with blanched vegetables (peas, spinach), live or frozen protein sources (daphnia, bloodworms), and occasional gel foods. Avoid floating pellets to reduce the risk of buoyancy disorders.
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Aquarium Setup for Red and Black Fantail
Aquarium Filtration
Use a high-capacity external canister filter or sponge filter rated above tank volume. Moderate flow helps with waste control without stressing the fish.
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Aquarium Plants
Opt for hardy, broad-leafed cold-tolerant species such as Anubias, Java fern, or Hornwort. Anchor plants securely to avoid uprooting.
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Aquarium Lighting
Moderate lighting supports plant growth without promoting excessive algae. LED systems with timers are ideal.
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Aquarium Heating
Typically not required unless ambient temperatures fall below 18°C. Ideal temperature range is 18–22°C.
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Aquarium Substrate
Smooth, fine gravel or sand is recommended to prevent injury to delicate fins.
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Aquarium Decorations
Use rounded, non-abrasive ornaments. Avoid sharp edges. Include open areas for swimming and low shelters for rest.
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