As with all other types of goldfish the Ryukin needs good quality water. They live happily in most temperatures, ranging from 64 to 72 Fahrenheit (17 to 22 Celsius). Kept in the right conditions, they can live between seven to ten years and grow to around 10 inches (25.5 centimetres) or more. Although these fish are not designed to be fast swimmers, they can be pretty boisterous and will go to great lengths to develop their own unique swimming style to compensate for their lack of dynamics.
Ryukin’s often can be extremely bold, and temperamental; it’s not an unusual sight to see a Ryukin give a friend, lingering near by, a swift peck and even chase them with no real reason. Of course each individual fish has their own personality traits and the Ryukin is no exception, but they have developed quite a reputation as being a bad boy fish. Don’t be surprised if you wake up one morning to find your Ryukin has vandalised the contents of the tank. They make an ideal pet for younger owners or people looking for interaction, such as hand feeding, as they particularly enjoy human company and are very intelligent.
They’re extremely amusing characters and provide hours of entertainment and laughter. If you’re considering keeping a Ryukin goldfish select tank mates carefully. It may not be advisable to keep a Ryukin with Dorsal-less fish such as Lionheads, Ranchus and Egg Fish; these fish are not strong swimmers and therefore may not fare well in a tank with a clumsy, rumbustious Ryukin. Be cautious about adding Moors, Celestials, Bubble Eye Fish or Demekins, not only are these poor swimmers but they are prone to injury as a result of their weird and wonderful eye shapes.
Although it is not an impossible to keep these fish with the Ryukin and many do with great success. Get to know your Ryukin before deciding to keep a more delicate fish with them. If you choose to add a more fragile member to your community, it maybe a good idea to choose a male. Spawning is a rough business with all types of goldfish but can be particularly brutal with the Ryukins.Winston and Muriel’s tank mate Billy, a beautiful Chocolate Pom Pom Oranda
Ideal tank mates for the Ryukin are Fan Tails, Orandas, Pearl Scales and other Ryukins. The more slender bodied fish such as the Commons, Comets, Shubunkins and Wakins maybe a suitable but with caution. Never keep any sucker fish such as Plecos, Loaches or Catfish with any type of goldfish, this is a common mistake with novice keepers and can result in injury or even death of the goldfish.