Aptasia?

I recently zapped one aptasia with Aptasia-X and it worked fine.

I noticed something else just now, completely by its lonesome in the sand. Nowhere near anything else. Sticking up, waving, with what look like tentacles. It is clear/translucent/white - not the ugly brown I see in aptasia pics.

I have a 92 gallon tank with about 55 lbs of LR.
3 chromis
2 clowns
2 cleaners
and a recent Kenya Tree.

The weird aptasia-possible things pre-dated the new coral. Could it be something other than aptasia? Or should I zap it while I can?

Thanks