SCUBA diving is swimming underwater, or taking part in another activity, while using a scuba set. By carrying a source of breathing gas , the scuba diver is able to stay underwater longer than with the simple breath-holding techniques used in snorkeling and free-diving, and is not hindered by air lines to a remote air source. The scuba diver typically swims underwater by using fins attached to the feet.
Scuba diving with dolphin is a very effective way and very funny to...
u can see how effective this is!!!!
YouTube - Scuba Diving With Dolphins