Goldfish (Fancy) Care Guide
Carassius auratus · Moderate care · 20 gallon minimum
Cool-water, heavy-waste fish that get big — fancy goldfish need 20g for the first fish, +10g each after.
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How big does a goldfish (fancy) get?
A goldfish (fancy) (Carassius auratus) reaches about 8.0 inches as an adult. Plan tank size and tank mates around the adult size, not the small fish you buy at the store.
Tank size & setup
Give a goldfish (fancy) a minimum of 20 gallons, with water at 65–75°F and a pH of 7–8. As a moderate-care, omnivore species, a stable, cycled tank with the right diet keeps them healthiest.
Good tank mates
Pair a goldfish (fancy) with peaceful species that share its temperature and pH range. Compatible options include:
- Neon Tetra — 1.5", 10g min
- Guppy — 2.0", 10g min
- Molly — 4.0", 20g min
- Platy — 2.5", 10g min
- Zebra Danio — 2.0", 10g min
About the goldfish (fancy)
The goldfish is a freshwater fish in the family Cyprinidae of the order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have become an invasive pest in parts of North America and Australia.
Recommended gear for goldfish (fancy)s
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