Hello, I really like scuba diving. My wife and I go all the time. 
Scuba diving is a form of underwater  diving in full body suits
You get to stay underwater, because you are breathing oxygen on your back.
you have to use a self-contained underwater breathing apparatus 
You get to see what the world is like underwater. watching all the life swim around you
Scuba divers carry their own source of breathing gas so they can stay under for a while, all the stuff down there is awesome
It really is surreal. although it can be very dangerous so you must be properly trained 
its a lot of fun tho