White tigers are not a separate species. They are a color variation of the Bengal tiger caused by a rare genetic mutation called leucism.
They are related to all other tiger subspecies, including Siberian, Sumatran, Indochinese, Malayan, and South China tigers. White tigers are not albinos—they typically have blue eyes.
Breeding white tigers can cause health problems due to inbreeding, so they should not be treated as a distinct species.