It was a Dottyback of some sorts, that's all we knew about it. Dottybacks are suppose to be peaceful community fish. This fish was the spawn of Satan! After years of not knowing, I came across a Google photo title "Royal Devil Dottyback", low and behold, it was my fish!!! Its a Palawan Labracinus cyclophthalmus aka Royal Devil, Fire-tail Devil, LOL.
I've never heard of dottybacks being peaceful fish.