Synonyms for the word "snorkeling" include scuba diving, free diving, skin diving and deep sea diving. These activities all involve exploring the underwater world with the use of equipment such as masks, fins, and snorkels. Scuba diving is a form of underwater diving that involves breathing air supplied from tanks, while free diving and skin diving both involve holding one's breath and free-diving deeper below the surface. Deep sea diving refers to diving in the deeper sections of the sea, and is often associated with commercial underwater work. Whatever synonym is chosen, it is clear that all of these activities allow us to discover new wonders within the aquatic realm.