swimming using a special pipe that you hold in your mouth and that sticks up above the surface of the water to let you breathe
The children were snorkelling in the ocean.
Vacationers often engage in snorkelling to marvel at underwater ecosystems.
Snorkelling is a popular activity in coral reef regions around the world.
The coral reef teemed with colorful marine life, attracting enthusiasts to snorkelling.
Safety guidelines emphasize the importance of proper equipment for safe snorkelling.