Shubunkin (single-tail)

Carassius auratus

Shubunkin (single-tail) (Carassius auratus) — Intermediate care, Peaceful, under Goldfish. Minimum tank in the app: 53 US gal min; aim for 50–72°F and pH 6.5–8. The single-tail Shubunkin is ideal for aquarists seeking a vibrant, active fish that thrives in spacious environments.

Shubunkin (single-tail) (Carassius auratus) in a planted freshwater aquarium
Care levelIntermediate
TemperamentPeaceful
Min tank size53 US gal min
pH range6.5–8
Temperature50–72°F
Max size11.8 in (30.0 cm)
Captive lifespan10–25 years
SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

East Asia

  • East & Southeast Asia

Regional colours match the stocking calculator’s origin map.

Shubunkin (single-tail) Tank Setup

Create a spacious tank with ample swimming area and moderate water flow, complemented by gentle filtration. Incorporate smooth substrate to protect their delicate bodies and use subdued lighting to mimic natural conditions, allowing for both open swimming spaces and areas of cover with plants or decorations.

What Do Shubunkins Eat?

Shubunkins are enthusiastic feeders, often competing for food with other active species. It's crucial to ensure they receive a balanced diet that supports their health and enhances their coloration, using high-quality pellets or flakes supplemented with vegetables and live food.

Shubunkin (single-tail) Tank Mates

Best paired with similarly sized, non-aggressive fish that occupy various swim zones. Ideal companions may include other goldfish varieties, but avoid overly small or aggressive species that could stress or outcompete them. Intraspecies, they can be kept in large groups without issues, promoting dynamic interactions.

Are Shubunkins Good for Beginners?

We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. Aquarists often underestimate the space requirements of Shubunkins, leading to stunted growth and increased stress. Neglecting water quality and temperature range can also result in health issues, as they are sensitive to abrupt changes in their environment.

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