Diu Diu Cave is akarst cave located inWaigani,Milne Bay Province,Papua New Guinea. Traversing through the cave is very difficult; it involves wading through mud and guano with a low ceiling that at times dips to 80cm clearance. The cave is home to a population ofblind cave eel, caveprawn, cave spiders and various species ofbats, includingflying foxes.^[1]

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