I've got a question for you if you've had a one-spot foxface long enough to read how their color reflects their mood. Obviously, they change color a lot. When I first got mine two and a half months ago, it was pretty freaked out in quarantine along with a powder brown tang and it would go tiger-striped or altogether pale at times. It was most often the expected one-spot on yellow you always see in pictures once it was in the display tank. But over the past several days or more it has been pretty consistently all black above and yellow below and constantly flashing his quills. It doesn't matter whether another fish is anywhere nearby. If I could say there was a dominant fish in the tank, then he'd be the one. He can monopolize the nori. He's certainly not being harassed by any other fish, and it's pretty rare that I've seen him push any other around though he does go all porupine if anyone gets too close except during a feeding frenzy. So, what's up with the black above? What does that signal? What's his mood?