dark cave in remote limestone island

acidification adventure alyui ampat batanta bay beautiful behavior biology blue canopy cave cavern change climate colonial colorful colors conservation coral diving ecology ecosystem environment equator equatorial evolution fish forest geologic geology habitat healthy indonesia island lagoon landscape life limestone mangrove marine misool natural nature niche ocean pacific papua raja reef reefscape remote research scenery scenic school science sea seascape shallow snorkeling stalagmite swimming swims symbiosis symbiotic tourism travel trees tropical tropics underneath underwater vibrant waigeo water wild wildlife