
Source: Wikimedia Commons
Carassius auratus var.
Classic goldfish with a round, humped body and elegant long fins. Rich variety in color — red, white, calico. Hardy and easy to keep — ideal for beginners.
The Ryukin is one of Japan's most iconic fancy goldfish varieties, believed to have arrived in Japan during the 18th century via the Ryukyu Islands (present-day Okinawa), which gave the breed its name. Its most distinctive feature is the pronounced hump at the shoulder and a deep, round body profile that creates a striking silhouette when viewed from the side. The tail fins are long and flowing, available in three-tail, four-tail, and cherry-blossom tail forms. Ryukin are relatively hardy and adaptable to a wide pH range of 6.5–7.5, making them suitable for beginner fishkeepers. They have hearty appetites and should not be housed with slower, more docile varieties. To prevent swim bladder problems, feed easily digestible foods in moderate amounts.
Source: Wikipedia (CC BY-SA 4.0)
Origin
China (introduced to Japan via the Ryukyu Islands)
Lifespan
10-15 years
Size
15-20cm
Temperature
10〜28℃(適温18〜25℃)
Goldfish pellets, bloodworms, vegetable-based food
45cm+ tank. Filtration recommended
pH 6.5-7.5. Adapts to a wide range of water quality
Good with similar-sized fancy types. Avoid fast single-tail types that outcompete for food
Round body shape increases swim bladder risk. Sinking pellets are safer
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Ryukin is 10〜28℃(適温18〜25℃). Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Ryukin is 10-15 years. With proper care and nutrition, they can live a long and healthy life.
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Ryukin typically reaches 15-20cm as an adult. Size may vary depending on care conditions and individual genetics.
Ryukin feeds on: Goldfish pellets, bloodworms, vegetable-based food. Aim for a balanced diet with appropriate feeding frequency.
The price of Ryukin varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.