Well, I nearly lost mine when it wouldn't eat, and it turned brownish with a bit of bleaching and shrunk to about half its original size. It was tough dealing with and when I started feeding it shrimp, it plumped right back up. Then it moved to a spot in the front of the tank and hung out for a couple months. Then it got caught on a Vortech that I had lowered, and when I peeled it off it went into hiding for about a month. I recently added a friend's sebae clown and the PLTA has moved to the other side of the tank to pal up with it. So we'll see how it goes.
Steve Weast, who was my original inspiration for getting one, got rid of his. They are tough to deal with when they cruise around the tank tasting everything!