Origins and Classification
- Scientific Name: Carassius auratus auratus (Oranda—Calico variety)
- Family: Cyprinidae (Carps & Goldfish)
- Origin: Selectively bred in China & Japan; ornamental strain developed from common goldfish.
- Popularity: Loved for its colorful calico pattern and iconic head growth (wen).
🎨 Appearance
- Color/Pattern: Multicolor calico mix (orange, red, white, blue/grey, and black) with speckles across body and fins.
- Distinctive Features:
- Prominent wen (hood) over head.
- Rounded body, double tail, flowing fins; slower swimmer than commons.
- Size: Typically 6–8 in (15–20 cm) in aquariums.
- Lifespan: 10–15+ years with excellent care.
🏡 Tank Requirements
- Tank Size: 30+ gallons for one; add 10–15 gal per additional Oranda.
- Water Parameters:
- Temperature: 65–75°F (18–24°C)
- pH: 6.5–7.5
- Hardness: 5–19 dGH
- Habitat Setup:
- Smooth sand or rounded gravel (protects wen/fins).
- Gentle filtration/flow; strong currents stress fancy goldfish.
- Open swimming space; plants/ornaments without sharp edges.
- 20–30% weekly water changes—goldfish are high-waste.
