'Pa-aling', or compressor diving, is common in the Philippines. But is a dangerous and controversial method of fishing. Breathing from just a single plastic air hose connected to a compressor at surface, these divers wear neither mask nor fins. In this most dangerous of jobs, decompression illness, otherwise known as 'the bends', is the biggest killer. Feared by many a diver, this is when one ascends too quickly, or stays at depth for too long. Pa-aling diving is contributing to the overfishing crisis in the Philippines.