is it extinct at a particular place?
Yes, in the Mediterranean sea and in Seychelles
Dugong
It has been confirmed that dugongs once inhabited the water of the Mediterranean possibly until after the rise of civilizations along the inland sea. 
where did cyclone althea hit? North Queensland in Australia mention a few tourist spots at the place mentioned above in australia? Great Barrier Reef; the rainforests in the Wet Tropics of Queensland; Magnetic Island what kind of hunting takes place at the first tourist spot? Hunting for Dugongs and green turtles where did the first animal get its name from? The name derives from the Visayan give a few details on its anatomy? Large, cylindrical shaped body that tapers at both ends with a large horseshoe-shaped muscular upper lip. It has a tail fluke and flippers.
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Dugong [SEP] Extinct Mediterranean population
It has been confirmed that dugongs once inhabited the water of the Mediterranean possibly until after the rise of civilizations along the inland sea. This population possibly shared ancestry with the Red Sea population, and the Mediterranean population had never been large due to geographical factors and climate changes. The Mediterranean is the region where the Dugongidae originated in the mid-late Eocene, along with Caribbean Sea.