Origins and Classification
- Scientific Name: Carassius auratus (Shubunkin variety)
- Family: Cyprinidae (Carps and Minnows)
- Origin: Japan (developed as a variety of goldfish in the early 1900s).
- Popularity: Highly popular ornamental goldfish variety due to their calico colors, hardiness, and ability to thrive in both aquariums and outdoor ponds.
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🎨 Appearance
- Body Color: Calico pattern with a mix of red, orange, yellow, blue, black, and white.
- Distinctive Features:
- Transparent (iridescent) scales that create a unique “painted” effect.
- Long, flowing fins in some varieties.
- Size: Medium to large — typically 6–8 inches (15–20 cm), can grow up to 12 inches (30 cm) in ponds.
- Lifespan: 10–15 years with proper care, sometimes over 20 years in large ponds.
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🏡 Tank Requirements
- Tank Size: Minimum 20 gallons for a pair; larger tanks or ponds are ideal (they produce a lot of waste).
- Water Parameters:
- Temperature: 65–75°F (18–24°C)
- pH: 6.5–8.0
- Water Hardness: Moderate to hard water tolerated.
- Habitat Setup:
- Require good filtration due to heavy bioload.
- Provide open swimming space (they are active swimmers).
- Hardy enough for outdoor ponds with mild winters.
- Avoid sharp decorations that may damage their flowing fins.