Red & White Ranchu Goldfish 7cm

Red & White Ranchu Goldfish are one of the most iconic and highly regarded fancy goldfish varieties.

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Ranchu is a dorsal‑less fancy goldfish known as the “King of Goldfish” in Japan.
The Red & White (Kohaku) Ranchu features:

• Bright red (hi) and clean white (shiroji) coloration
• No dorsal fin (smooth arched back)
• Rounded, egg‑shaped body
• Prominent head growth (wen) covering the cheeks and head
• Short, powerful tail set low and wide

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Key Characteristics

Feature	Description
Breed	Fancy Goldfish (Ranchu)
Color Pattern	Red & white (Kohaku)
Dorsal Fin	Absent
Wen	Moderate to heavy
Adult Size	5–7 inches
Swimming Style	Slow, waddling
Skill Level	Intermediate to Advanced

Care Requirements

Tank & Setup

• Minimum 20–30 gallons per fish
• Prefer wide, shallow tanks (or tubs)
• Smooth substrate or bare bottom to avoid abrasions

Water Parameters

• Temperature: 18–23°C (65–74°F)
• pH: 6.5–7.5
• Excellent filtration but gentle flow

Diet

• High‑quality sinking pellets
• Gel foods (excellent for Ranchu digestion)
• Blanched vegetables (peas, spinach)
• Occasional protein treats (bloodworms, brine shrimp)

Carotenoid‑rich foods enhance red coloration.

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Common Health Considerations

• Swim stability issues (due to rounded body)
• Wen overgrowth (may require trimming by experts)
• Sensitive to poor water quality
• Prone to bacterial infections if waste accumulates

Daily observation and frequent water changes are key.

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Ideal Tank Mates

• Other Ranchu
• Orandas
  

 Avoid fast or slim-bodied goldfish (comets, shubunkins).