I can't quite tell if the underwater baby photographers are riding the trend of Aquababy/water acclimatization classes, or if the desire for a picture of your own kid on the cover of a Nirvana album is so strong, you'll put him through all the classes it takes.
Either way, after all that outlay, I'd like to not have to pay extra to keep the photographer's URL off my kid's picture.
Urchin Rock underwater baby and family photography, 40-50 pounds/session, 20-250+ pounds for product [urchinrock.com via notcot]