The Shubunkin is one of the more popular Goldfish varieties, ideal for unheated tanks and also for outdoor garden ponds. It is hardy and easy to care for. The colouration of each fish can vary significantly, some fish are predominantly blue, some mostly red, etc. Shubunkins first appeared in Japan at the end to the nineteenth century. = FEATURES OF SHUBUNKIN GOLDFISH: The head of this fish is typically wide but short. Their bodies have a smooth taper while the expansive dorsal fin is almost always standing erect These fish come in many different patterns, all with calico coloration Most Shubunkins are also heavily spotted, making each one unique THE BEST AQUARIUM SIZE FOR SHUBUNKIN GOLDFISH: 75L is the minimum size needed for shubunkin goldfish. Because these fish are such fast growers, the bigger the tank the better.