I've been looking into getting an eel of some type for my 60 cube. The one that has caught my eye (if I can find one) is the dwarf golden moray eel. I'm going to have a lot of corals. The one thing I am worried about though is the eel breaking the SPS by moving around it. Is that something I need to be worried about? Or do they tend to stay in their one hole? In other words, I know some eels are listed as reef safe, but to what extent?