Sofyan Sabi's sea-dwelling community has fished beneath the waves off the Indonesian coast for centuries, but climate change and overfishing have forced him and many of his contemporaries on land to make a living.
The Bajau tribe of fishermen led a nomadic life at sea for generations, spending days and nights on boats with thatched roofs in the waters between Indonesia, Malaysia and the Philippines.
Members of the tribe learn to dive from a young age, and their bodies have adapted over time to allow them to fish underwater for longer periods, researchers say.