I've been scuba diving earlier this month. I got certified last year as a christmas present, and this trip was my b-day one. It's a small boat wreck in the St. Lawrence river that's a great first trip to try diving in a wreck when there's current.
Analog underwater photography is mostly limited to disposable cameras, but they're great fun, even in the murky waters of St. Lawrence.
These are really good for a disposable camera. Find yourself a good used Nikonos...the model 11 and 111 are the best...these are are great way to start out.