Simplify the following text for a Grade 6 native English-speaking person.
Original: The white tiger is not a separate sub-species , but only a color variation ; since the only white tigers that have been observed in the wild have been Bengal tigers ( and all white tigers in captivity are at least part Bengal ) , it is commonly thought that the recessive gene that causes the white coloring is probably carried only by Bengal tigers , although the reasons for this are not known . Nor are they in any way more endangered than tigers are generally , this being a common misconception .
Simplified: White Tigers are most commonly Bengal tigers .