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Fancy goldfish (Carassius auratus)
Photo: לינה אבוגוש · CC BY-SA 3.0 via Wikimedia Commons

Fancy goldfish

Carassius auratus · Cyprinidae

Also known as Oranda, Ryukin, Fantail

Intermediate

Cold-water, heavy-waste fish that needs volume and filtration far beyond a bowl.

Minimum tank
150 L
Temperature
16–23 °C
pH
7–8.4
Adult size
20 cm
Group size
2+
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Care requirements
Minimum tank volume
150 L
Temperature
16–23 °C
pH
7–8.4
Hardness
8–25 dGH
Lifespan
10–15 years
Diet
Omnivore — sinking goldfish pellets, blanched vegetables, gel food.
Care level
Intermediate
Origin & habitat
Native region
Domesticated from East Asian carp
Water type
Freshwater
Biotope
Cool, slow ponds
Natural conditions
Cool, hard, well-filtered still water.
Behaviour & stocking
Temperament
Peaceful
Minimum group
2 fish
Swims
All levels
Good tank mates
Other fancy goldfish
White cloud mountain minnow
Avoid
Tropical fish
Shrimp
Fin nippers
Breeding & difficulty
Breeding difficulty
Intermediate
Sexing
Breeding males show white tubercles on gill covers and pectoral fins.
Notes
Spring spawner triggered by warming; eggs are scattered on plants.
Common ailments
Swim bladder disorder
Dropsy
Ich
Ammonia burn in small tanks

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