Can rock and lta touch?

[Jvesche20]

I recently got a few new nems and I added them into the tank last night and they were put no where near each other and this morning I woke up and noticed they were touching. Should I move them? Will they sting each other or are they fine?

 

[Cell]

If they haven't stung each other yet, you might be ok, but I wouldn't risk it. The LTA should be in the sandbed and the RFA on a rock somewhere, it's hard to tell what both are sitting on in this pic.