Thanks very much for that tip! As I thought, it was a stupid question. I thought that the square button was just to surface (i.e. with your head above the water) in stead of climbing up again. Which is actually not very logical since you automatically go up if you don't hold circle. But that is the risk sometimes with a game as deep and big as FF; sometimes you just think too hard on something very simple. Anyway, I now have Anima and the Magus Sisters and I have unlocked Yuna's Nirvana, so this really helped me! Thanks again!