Blue Ranchu Goldfish – Unique Fancy Goldfish for Aquariums & Ponds

About the Blue Ranchu Goldfish

The Blue Ranchu Goldfish is one of the most unique fancy goldfish varieties, prized for its round body, lack of a dorsal fin, and metallic blue-gray coloration. Ranchus are often called the “king of goldfish” in Japan and are especially popular among collectors.

At 2–2.5 inches, these young Ranchus are perfect for aquarists looking to raise and grow out a show-quality goldfish.

Care Guide

• Scientific Name: Carassius auratus (fancy goldfish)
• Variety: Ranchu (Blue)
• Size: 2–2.5 inches (juvenile)
• Adult Size: 5–8 inches
• Temperament: Peaceful
• Lifespan: 10–15 years (with proper care)
• Difficulty: Intermediate (due to fancy body shape)

Tank Requirements

• Minimum Tank Size: 20 gallons for juveniles, larger as they grow
• Water Temperature: 65–75°F (18–24°C)
• pH Range: 6.5–7.5
• Substrate: Smooth gravel or sand to protect delicate fins
• Décor: Avoid sharp decorations, use smooth rocks and plants
• Filtration: Strong but gentle (avoid strong currents)

Diet & Feeding

Blue Ranchu Goldfish are omnivores. Offer a balanced diet of:
✔️ High-quality goldfish pellets
✔️ Frozen/live foods (bloodworms, brine shrimp, daphnia)
✔️ Blanched veggies (zucchini, peas, spinach)

Tankmates

Ranchus are slow swimmers due to their body shape. Best tankmates include:

• Other fancy goldfish varieties 🎏
• Peaceful community fish (in larger tanks)
• Do not house with fast or aggressive fish

Why Choose the Blue Ranchu?

✔️ Rare and highly sought-after color variety
✔️ Peaceful and beautiful centerpiece fish
✔️ Collectible fancy goldfish for enthusiasts
✔️ Long-lived with proper care

FAQ

Q: How big will my Blue Ranchu get?
A: Typically 5–8 inches as an adult.

Q: Can I keep Blue Ranchus in a pond?
A: Yes, if the pond is temperate and predator-safe.

Q: Are Ranchus harder to care for?
A: They require stable water quality and gentle filtration due to their body shape.

Closing Section

Bring Home a Rare & Beautiful Blue Ranchu Goldfish
Known as the “king of goldfish,” the Blue Ranchu combines rarity, beauty, and charm. At 2–2.5 inches, these juveniles are perfect for aquarists who want to raise a unique, show-quality fancy goldfish.