I have an LTA that sat in the corner of my tank, never moving, and causing no problems...one morning not long ago, I awoke to find it completely engulfing three SPS frags, killing all three in the process...as soon as someone gets this thing to come loose off the rock, it is GONE!!! In fact, it sat on top of a colony of zoas that has since done a color morph due, in my opinion, to the long exposure to the tentacles of this murderer.