skin diver
/ˈskɪnˌdaɪvər/
noun
- A person who swims underwater using only a mask, fins, and a snorkel or breathing apparatus, without a heavy diving suit.
- The skin-diver explored the coral reef with just a mask and fins.
- My uncle is an experienced skin-diver who loves to photograph sea turtles.
- A group of skin-divers descended into the clear blue water to search for shells.