Ryukin Goldfish 7-8cm
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🐟 Ryukin Goldfish Care Sheet
🔹 Overview
| Category | Details |
|---|---|
| Scientific Name | Carassius auratus (Ryukin variety) |
| Common Name | Ryukin Goldfish |
| Origin | China & Japan (selectively bred) |
| Adult Size | 15–20 cm (6–8 in), sometimes larger |
| Lifespan | 10–15 years (up to 20+ with excellent care) |
| Temperament | Peaceful, social |
| Tank Level | Mid-level |
🔹 Tank Setup
| Parameter | Ideal Range |
|---|---|
| Tank Size | 75+ liters (20+ gallons) for one; +40 liters per additional fish |
| Temperature | 18–23 °C (64–74 °F) |
| pH | 6.5–7.8 |
| Hardness | 5–15 dGH |
| Substrate | Smooth gravel or sand |
| Decor | Smooth rocks, hardy plants, open swimming space |
| Lighting | Low to moderate |
| Filtration | Strong filtration; goldfish produce heavy waste |
Tips:
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Avoid sharp decorations—Ryukins have delicate fins.
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Provide high oxygenation and strong filtration to handle waste.
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Best in larger tanks due to size and activity level.
🔹 Diet
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Type: Omnivorous
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Best Foods: High-quality sinking goldfish pellets, gel foods, blanched vegetables (peas, spinach, zucchini), occasional frozen foods (bloodworms, brine shrimp).
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Feeding Frequency: 1–2 small meals daily; avoid floating foods to reduce swim bladder issues.
🔹 Behavior & Compatibility
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Peaceful and social; best kept with other fancy goldfish.
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Slow swimmers—may struggle competing with fast tankmates.
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Do not keep with fin-nippers or tropical fish requiring high temps.
🧭 Tank Mate Guide
✅ Compatible Species
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Other fancy goldfish varieties (e.g., Oranda, Fantail, Ranchu)
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Weather loaches (in cooler setups)
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White Cloud Mountain Minnows (in large tanks only)
⚠️ Avoid or Use Caution With
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Comet or Common goldfish (too fast and aggressive eaters)
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Tropical fish requiring higher temps
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Fin-nippers or aggressive species
🐣 Breeding Info
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Spawning Method: Egg scatterers; use spawning mops or dense plants.
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Parental Care: None; adults will eat eggs.
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Fry Care: Feed infusoria or powdered fry food, then baby brine shrimp.
🌿 Fun Facts
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Known for its high dorsal hump and deep, rounded body shape.
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One of the oldest and most popular fancy goldfish varieties.
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Their unique “chubby” body makes them prone to buoyancy issues, so sinking foods are ideal.
