Swimming with the fish!

Scuba diving is swimming underwater with use of scuba set like carrying a source of breathing gas. This will allow for the diver to stay long underwater. But do you know that scuba diving arose in World War II? Yes, it is. In fact, it was originally pertain to the United States combat frogmen's oxygen rebreathers, developed by Dr. Christian Lambertsen for underwater hostilities.

I went snorkeling and deep sea diving some time ago in Hawaii, it was very spooky and fun being out in the deep blue. I saw a bunch of nurse sharks, sea turles, thousands of schools of fish and even ran into a another group of deep sea divers! I would do it again!