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The BBC’s Human Planet program is a stellar documentary series about nature and human life. Over the course of the past few months, the program has covered such interesting stories as the Bajau underwater hunter, the building of a green city in Dubai, and camel herding in the Gobi desert.

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This Indonesian underwater hunter has trained his body to do something incredibly unmammalian: he can spend extended periods of time deep into the sea without any fancy scuba equipment. In this clip from a BBC Human Planet episode, Sulbin the hunter swims down 20 meters—just over 65 feet—below the surface to search for fish on the sea floor.