They will all get big eventually, and you can sell them too.
Exactly what my GBTA is doing since I brought it home two days ago. It squeezed itself between the rocks to the point I thought there was no way for it to get back out. But I left it alone and sure enough it started slowly to come out.Whenever I add an anemone, they seem to squeeze themselves between the rocks, and then slowly come back out. They might move a few inches here and there getting an ideal position, but not inflate and blow around.