The tiger there is a known mutation that leads to the appearance of individuals with a full white color - Bengal Tigers with black and brown stripes on a white fur and blue eyes. This color is very rare in wild animals, but is relatively common in populations kept in captivity.
The frequency of occurrence of white tigers - one individual per 10,000 with normal color. White tigers are an excellent breed in captivity. The first mention of them belong to 1951, when one of the hunters took away from the den of the tigress he found a white tiger cub.