Funny Acting Sebae Anemone

[aftrhrs]

My Sebae anemone went behine my wall of live rock and stayed shriveled up for about 4 days. It now has come back out to the front of the live rock and has fully opened again and looks healthy. I looked behind the live rock where it was and now there is the white egg looking thing sitting there. It is about the size of one of those small chocolate footballs you eat at easter time. what is this? Do I need to get it out of my tank, move it into the lighting, or just leave it be?
thanks,

 

[aftrhrs]

Somebody has to have a clue. This thing has my curiosity up. If I could get to it without moving rock I would have been checking it out already.

 

[clarkiiboi]

As far as I know anemones reproduce by splitting. The white egg looking thing may be a type of sponge. Because I get too curious, I'd have to move a rock or two and get a better look. If you do get a good look at it can you post a pic?