The Bajau or Bajaw are an indigenous ethnic group of the southern Philippines. Due to escalated conflicts in their native Sulu Archipelago of the southern Philippines, many of the Bajau have migrated to neighboring Malaysia over the course of 50 years. Currently they are the second largest ethnic group in the state of Sabah, making up 13.4% of the total population. Groups of Bajau have also migrated to Sulawesi and Kalimantan in Indonesia, although figures of their exact population are unknown. They were sometimes referred to as the Sea Gypsies, although the term has been used to encompass a number of non-related ethnic groups with similar traditional lifestyles, such as the Moken of the Burmese-Thai Mergui Archipelago and the Orang Laut of southeastern Sumatra and the Riau Islands of Indonesia. The modern outward spread of the Bajau from older inhabited areas seems to have been associated with the development of sea trade in trepang.
Actually, I met these people in a video which tells about a "diver" in Bajaus. It is really interesting how these people live, how they adapted to sea. In the video that I watched, it was focusing in one specific man who adapted a lot more than the others. He was born to be diver.
*retrieved from http://www.wikipedia.com