Ryukin Goldfish Care Guide
The Ryukin goldfish (Carassius auratus) is a popular fancy goldfish in the UK, known for its deep body shape, high back (hump), and flowing fins. With its bold appearance and active nature, it's a standout choice for fancy goldfish aquariums.
In this guide, you'll learn everything you need to know about Ryukin goldfish care, including tank size, water conditions, compatibility, feeding, and typical UK prices - plus how to buy or sell them locally.
Quick facts about Ryukin Goldfish
Ryukin goldfish are a fancy variety characterised by their pronounced shoulder hump and double tail. They are slightly more active and robust than some other fancy goldfish.
They come in a wide range of colours, including red, white, calico, and tricolour varieties.
Carassius auratus
15-20 cm
Domesticated (developed in Japan)
100L+ (single fish)
10-15+ years
Peaceful, moderately active (for a fancy goldfish)
18-24°C
Omnivore (sinking pellets, vegetables, frozen foods)
6.5-8.0
£6-£20 per fish
How Many Ryukin Goldfish Should You Keep?
Ryukin goldfish are social and should be kept with other suitable fancy goldfish.
- Keep at least 2 where possible
- Only house with similar fancy varieties
- Ensure adequate space per fish
Overstocking can lead to:
- Poor water quality
- Competition for food
- Stress and stunted growth
Providing enough space is key to maintaining their health.
Ideal Tank Conditions for Ryukin Goldfish
Creating the right environment helps Ryukin goldfish thrive.
- Tank Setup: Spacious aquarium with open swimming space
- Substrate: Sand or smooth gravel works well
- Plants & Decor: Use smooth decor and hardy plants
- Water Conditions: Stable, well-oxygenated water
- Filtration: Strong filtration is essential due to high waste output
- Lighting: Moderate lighting is suitable
Avoid sharp decorations to protect their fins.
Compatibility with Other Fish
Ryukin goldfish should only be kept with compatible species.
- Good Tankmates: other fancy goldfish such as fantails, orandas, and Black Moors
- Avoid: common or comet goldfish (too fast), tropical fish, and fin-nippers
Their moderate activity level still makes them unsuitable for faster species.
Are Ryukin Goldfish Easy to Care For?
Ryukin goldfish are easy to moderately easy to care for and are suitable for beginners.
They require:
- A well-filtered, spacious tank
- Appropriate tankmates
- Regular maintenance
- A balanced diet
They are slightly hardier than some delicate fancy varieties.
Ryukin Goldfish Price in the UK
In the UK, Ryukin goldfish typically cost between £6-£20 per fish.
Prices vary depending on:
- Colour and pattern
- Body shape and fin quality
- Shop vs hobbyist sellers
They are widely available and come in many attractive varieties.
Where to Buy Ryukin Goldfish in the UK
Ryukin goldfish are widely available in UK aquarium shops and from private sellers.
Sourcing fish locally can:
- Reduce transport stress
- Allow you to assess quality and shape
- Offer better value
TankMate UK helps connect fishkeepers who want to buy, sell, or rehome fish safely - without shipping.
Can You Sell Ryukin Goldfish?
Yes - Ryukin goldfish are commonly sold or rehomed by hobbyists.
Selling locally is often the best option, as it:
- Minimises stress for the fish
- Avoids the risks of transport
- Helps find suitable homes
TankMate UK allows you to list fish quickly and find local buyers.
Feeding Ryukin Goldfish
Ryukin goldfish require a balanced and appropriate diet.
Key Tips:
- Feed high-quality sinking pellets
- Supplement with vegetables like peas and spinach
- Offer occasional frozen or live foods
- Avoid overfeeding
Sinking foods help reduce the risk of swim bladder issues.
Common Problems with Ryukin Goldfish
Swim bladder issues, often caused by:
- Poor diet
- Overfeeding
Fin damage, caused by:
- Sharp decorations
- Aggressive tankmates
Poor water quality, linked to:
- Overstocking
- Inadequate filtration
Why Ryukin Goldfish Are So Popular
- Distinctive high-backed body shape
- Wide variety of colours and patterns
- Hardier than many fancy goldfish
- Peaceful and community-friendly (with other fancies)
- Visually striking in aquariums
When kept correctly, Ryukin goldfish are a bold and attractive addition to a fancy goldfish setup.
Frequently Asked Questions
Their high back (hump) and deep body shape distinguish them from other fancy goldfish.
Yes, they are relatively hardy compared to many other fancy varieties.
No, they are coldwater fish but prefer stable temperatures.
At least 100 litres for one fish, with more space for additional fish.
Looking to Buy or Sell Ryukin Goldfish Locally?
TankMate UK connects fishkeepers who want to buy, sell, or rehome fish safely within their local area.
Whether you're stocking your aquarium or passing fish on to a new home, you can:
- Browse fish available near you
- List your own fish in minutes
- Avoid the risks of transport