Tosakin Goldfish
The Tosakin goldfish is a type of fancy goldfish that was first developed in Japan. The Tosakin goldfish is sometimes referred to as the “curly fantail goldfish”, due to the unique nature of its tail. The tail is the most remarkable feature of the Tosakin goldfish, since it is a large, undivided fin that spreads out like a fan when the fish swims. Some fish enthusiasts also refer to the Tosakin goldfish as the “peacock tail goldfish”, because of the shape the tail forms when fully extended.
The shape of the Tosakin goldfish’s body is said to be similar to that of the Ryukin, which has a distinctive hump that is present right around the “shoulder” area of the fish. The Tosakin’s most distinctive feature, its fan-like tail, is also the reason for the relative fragility of this fish breed. Since the Tosakin was inbred many times during its early stages, it is a fairly unskilled swimmer. This is the main reason why Tosakin goldfish need to be kept in a tank without an existing current, and in relatively shallow water.
Unlike some other hardier fish, the Tosakin is very sensitive to sudden changes in the water chemistry of its tank. This is the main reason why Tosakin goldfish are fairly high maintenance, since their tank needs to be under constant monitoring for any changes. As far as color, Tosakin goldfish are commonly seen in calico, black, red white and pure red. Tosakin goldfish are usually only seen in Japanese aquariums.