Ranchu Red/White Goldfish
Carassius auratus
Origin: Captive bred
Water Parameters
Quick Stats
- Max Size
- 20 cm
- Min Tank
- 150 L
- Lifespan
- 10-15
- Swimming Level
- all
- Schooling
- No
- Diet
- omnivore
- Temperament
- peaceful; best viewed from above in shallow tanks; keep only with other fancy goldfish; prone to buoyancy issues if fed surface foods
About
The Ranchu is often called the King of Goldfish in Japan, featuring a deeply curved back, no dorsal fin, and a characteristic downward-pointing head. This red-and-white variety displays excellent body conformation and a well-developed wen. Shallow tanks or outdoor tubs provide the optimal top-down viewing angle to appreciate the Ranchu's distinctive body profile. One of the most highly regarded and selectively bred goldfish varieties worldwide.
Care Guide
Minimum 150 L with gentle filtration. pH 7.0–8.0, GH 5–15, KH 3–8, temperature 10–22°C. Shallow tanks (30–40 cm depth) preferred for optimal top-down appreciation of body form. Feed sinking pellets and gel food. Keep with other fancy goldfish only. 25% weekly water changes. Monitor for swim bladder issues — compressed body prone to buoyancy problems.
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