The BADJAO tribe are nomadic SEA GYPSIES. They can be found in SE Asia, Malaysia, Indonesia and the Philippines, with numbers around 100,000. Traditionally, the Bajau, even today, live mostly on the sea.
Badjao divers descend 20meters (65feet) to sea floor, hearts slows down to 30beats per minute, squezzes its lung to 1/3 of its initial volume, even without weights he is negatively bouyant enough to strive across the bottom of the sea as if like hunting on land, 2 1/2 minutes of hunting under pressure. He can still manage to stay as long as 5 minutes!