Galaxea sting anything but coral?

[PPPPPP42]

About the only place I can find to isolate the Galaxea coral my wife bought (on its own rock on the sand bed) would leave its sweeper tentacles swinging around in a primary feeding area for the fish and eventually when it grows, quite close to one of the two openings for the hole the pair of yellow watchman gobies live in.
So do those the tentacles sting anything but corals?
I really hate this thing but it’s my wife’s tank and I am trying to trouble shoot placement since she likes it.

 

[Daniel@R2R]

Not sure on that. I'd imagine it could sting other inhabitants, but maybe someone with more knowledge than me will weigh in.