Carassius auratus
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What to know before you buy.
Highly prized in Japan, the Ranchu is known as the 'King of Goldfish.' It has a distinctively arched back, no dorsal fin, and a prominent head growth. Their unique body shape makes them clumsy swimmers, requiring specialized care in a bare-bottom tank with gentle filtration to prevent injury.
Key traits
Select a tank to see how this species fits.
Everything you need to keep Ranchu healthy in a South African setup.
Size the aquarium to Ranchu's adult size and activity level. Match décor to natural behaviour — plants, rockwork, or open swimming room as needed.
Keep pH 6.5–8 and 18–23°C. Stable parameters matter more than chasing perfect numbers — acclimate new arrivals slowly.
Ranchu is an omnivore. Feed a varied diet appropriate for freshwater fish — quality flakes, pellets, or frozen foods sized to the mouth.
Ranchu is generally peaceful. Observe during feeding and at lights-out for true temperament.
Pair with similarly sized peaceful tankmates in freshwater fish. Avoid fin-nippers or species that outgrow this fish.
Breeding notes for Ranchu vary by line and water chemistry — ask your local shop about proven pairs in SA.
From hobbyists across SA.
Price trends and buyer demand — data only FishHub tracks.
SA price range this month: R345–750 · Average: R482
This data is unique to FishHub
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Species that typically work alongside Ranchu in a similar setup.
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