World Snorkeling Day is celebrated on June 30 of every year. Snorkeling is the practice of swimming through the water while equipped with a diving mask, a shaped breathing tube called a snorkel, and usually swimfins. It requires little effort as long as one knows how to swim, as you don’t need training or any complicated equipment — like in the case of scuba diving — so it remains a very popular activity for people of all ages, especially tourists in tropical resorts that wish to see aquatic life from up close. It is also used by scuba divers when on the surface, in underwater sports like underwater hockey and underwater rugby, and as part of water-based searches conducted by search and rescue teams.