This movie will blow you away, no matter your age. You feel as if you are actually underwater with these animals. A special treat was when they took you above water to the scenery in 3-D, again feeling like you were there. I've never experienced anything like it.
The one negative: it gets a little old being told such beauty is going away because of global warming and human neglect. It's an important message no doubt - - but one that the film should have let the viewer realize on his/her own, rather than have it made so explicit. A minor point though - because the visual experience far outweighs the negatives.