Corals bleach for a variety of reasons. We say bleaching when they turn pale or white. High temperature or exposure to light that is too intense without being acclimated to it is another reason. They also tend to pale out if they are starved of nutrients. If you obtained it bleached then it should color back up in your aquarium if the conditions are right.
Looks like it has gotten alot of zooxanthellae back so give it time and it should get the rest of the colors back. Too early to tell what it is at this point.