The Kurilian Bobtail is a cat breed (or breed group, depending on registry) originating from the Kuril Islands, claimed by both Russia and Japan, as well as Sakhalin Island and the Kamchatka peninsula of Russia. Short- or long-haired, it has a semi-cobby body type and a distinct short, fluffy tail. The back is slightly arched with hind legs longer than the front, similar to those of the Manx (cat). The original short-haired variant is a natural breed, ) and by the Fédération Internationale Féline (FIFe). The World Cat Federation (WCF) recognizes them as a single breed., the Cat Fanciers Association (CFA) does not recognize the breed at all.While possibly closely related to the Japanese Bobtail breed – both share the same kind of kinked, short tail, but the Japanese is leaner, more angular and less cobby – the Kurilian originated on the complete opposite side of Eurasia from the similarly named Karelian Bobtail of western Russia and Finland, and is thus unlikely to be a near relative. Genetic studies may eventually demonstrate the breed's connection to others. Just as the Japanese Bobtail and tailless-to-short-tailed Manx (cat) arose independently on islands a world apart, the Kurilian's bobbed tail may be an isolated spontaneous mutation, that became common on the Kuril and Sakhalin islands because of the limited genetic diversity of island biogeography (an example of the founder effect and, at, of the species-area curve).