Normal for zoa heads to move?

Just now one of my zoa heads moved around, and i looked underneath to see if there was an invert like a cerith underneath it but there were none.

It was just this one polyp head, i thought it was kind of neat, is this normal, i didn't think zoas did this?

 

yes they will move, bend, shrink, stretch, etc. usually depends on time of day and the last time they had light.

sometimes single polyps will detach and grow elsewhere too

 

that's interesting, i was just watching them just now, and they were all moving around, i know it's not the flow because they usually don't do this, first time i've seen it, pretty cool.

And they've had light all day, like for 5 hours now, and their all fully open

 

I have put polyps in a crevice upside down so that they would move off the frag rock and onto the rock I wanted them on. Worked perfectly. Just an idea on how to get them to move to where you want them to be.

 

Zoas do change shape and can appear to move slightly but I believe they are pretty fixed to the substrate. What I've seen them do that does appear to make them "move" is that one will stretch out and contact another rock in the middle of the "stalk" and then attach to that rock eventually, then if you were to cut the stretching piece you would have a zoa polyp on the new piece of rock. It's just part of them spreading/reproducing. Pretty cool though!

I'm pretty sure it wasn't "looking" at anything since they have no central nervous system though. ;D