A snorkel is a tube that allows a person to breathe while swimming underwater. It is typically made of plastic or rubber and is used in conjunction with a mask that covers the eyes and nose. The snorkel extends above the water's surface, enabling the swimmer to inhale air without having to lift their head. Snorkeling is a popular recreational activity that lets people explore coral reefs, marine life, and other underwater environments. It is often done in shallow waters, making it accessible for beginners. Proper use of a snorkel can enhance the experience of observing underwater ecosystems.