Fantail Goldfish
The Fantail is an egg-shaped fancy goldfish with a doubled, fan-spread tail, hardy enough for beginners.
Last reviewed: October 2026
Species guide: Goldfish · Goldfish and koi, breed by breed
AI illustration Overview
The Fantail is an egg-shaped fancy goldfish with a doubled, fan-spread tail, hardy enough for beginners. It is the sensible first step off the single-tail path: round and charming without the extreme fragilities of bubble-eyes and celestials.
Natural History
The oldest and simplest of the western fancy types, descended from Chinese double-tailed goldfish lines centuries old; essentially the base model all fancier breeds elaborate on.
Appearance
Egg-shaped body 15-20 cm with a paired (double) caudal fin spread like a fan; orange, calico, red-white and black forms. Deeper-bodied than singles, slower in the water.
Tank Size & Setup
75-100 liters for the first fish +40 per extra; smooth decor (trailing fins snag), gentle-moderate flow, and NO mixing with fast single-tails who outcompete them at feeding time.
Water Parameters
18-23°C (fancies prefer slightly warmer than singles), strong but diffused filtration, weekly water changes; stable beats perfect.
Diet
Sinking pellets or gel food (surface-gulping worsens buoyancy issues), peas and greens regularly - the egg-shaped gut repays a fiber-forward menu.
Health & Lifespan
Average lifespan is 8-12 years. The hardiest of the fancy shapes, but the compressed body still invites swim-bladder complaints - management is diet and water quality. 8-12 years typical.
Pros & Cons
Pros
- Hardy for a fancy
- Classic beautiful fan tail
- Good-natured community goldfish
- Ideal first fancy breed
Cons
- Slower: don't house with singles
- Some swim-bladder tendency
- Needs bigger tanks than assumed
- Fins can snag on rough decor
Everyday gear for aquariums
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Fantail Goldfish - frequently asked questions
Can Fantails live with Comets?
Better not - the athletic singles eat everything first and stress the slower fancies. Keep body-types with their own kind.
Why sinking food?
Gulping air at the surface aggravates the buoyancy problems egg-shaped goldfish are prone to - sinking pellets and gel food sidestep it.
Pond or tank?
Tank (or summer pond holidays in mild weather) - fancies handle cold and predators worse than singles; year-round ponds suit them only in mild climates.
Test yourself: guess the fish
Three clues from our quiz bank, each about another of our fish. Can you name them?
Clue 1.Aquarists prize this small loricariid because, unlike its giant relatives, it tops out around five inches and won't outgrow a community tank.
It's the Bristlenose Pleco - read the full profile →
Clue 2.This small South American scavenger has tiny barbels and a sharp spine in each fin that can lock upright for defense.
It's the Corydoras Catfish - read the full profile →
Clue 3.This tall, triangular freshwater fish from the Amazon basin swims with trailing fin filaments and is a graceful staple of community aquariums.
It's the Angelfish - read the full profile →