Here's a link to view some of the work of photography Howard Schatz. He photographs his models underwater in these photos. Some of the pieces have a dream-like quality to them. Cool stuff.

http://www.popphoto.com/gallery.aspx?section_id=50&section_prefix=featuresamer&webtrends_section=featuresamer&article_id=4706&window_id=1&gallery_id=1148&page_number=1&seq=6&cnt=81&slide=on