https://en.wikipedia.org/wiki/Manx_cat

The Manx cat (/ˈmæŋks/, in earlier times often spelled Manks) is a breed of domestic cat (Felis catus) originating on the Isle of Man, with a mutation that shortens the tail. Many Manx have a small stub of a tail, but Manx cats are best known as being entirely tailless; this is the most distinguishing characteristic of the breed, along with elongated hind legs and a rounded head. Manx cats come in all coat colours and patterns, though all-white specimens are rare, and the coat range of the original stock was more limited.