BTA - exactly what can they touch?

[SDguy]

I recently purchased a RBTA since it is *the* one thing I still have always been envious of in other reefers' tanks. So, like most people, my tank is STUFFED. I would like to know what the nem can touch and not bother at all/get stung itself, what it can touch and sting a little, and what it will simply annihilate if it touches. It's a rose BTA in case that makes any difference to people :)

[ivgonmad]

so far the one I got from RAP killed all my Xenia by just walking over it :eek: it stung a monti but didn't do much damage, and touched a crocea clam w/no effect on the clam or 'nem