i'd be a little ashamed to say i don't exactly know when the royal gramma died...it was always hiding in the powerhead bracket so it may have been in there for a while. I don't like messing with them if they find a hiding spot for stress reasons. it could have been decomposing (no, i have no testable ammonia or nitrites--tested after taking out the body) to look that way.
before hypo started, i had a blue leg hermit in there to help out with excess food. other than that, there is just the blenny. i cannot believe the blenny would have done this damage either.
there are three pieces of pvc fittings in there, the power head, and a penguin hob filter