Can Zoas sense SPS (Acropora) being placed near them?

[LMDAVE]

I've been doing some experimentation in my tank with move the placement of some acro frags. I have this "fire and Ice" zoa patch that has been doing great night or day, wide open, up top in flow. However, I just moved this acro frag on a hill near the zoa patch, it's not really blocking any light, but the Fire and Ice have closed up a lot and this is the most they are opening now.

So, this leads to my question of, Can zoas sense acropora near them and react this way?

This is a before and after picture

 

[glb]

If they’re closed then something’s irritating them. I’d keep an eye on them and if they don’t open back up then you could test your theory by moving the acro.

 

[LMDAVE]

Yeah,I'll give them some time to see how they do. Just thought this was an interesting change as soon as I placed the acro there.