Because their predators eat them and human beings kill them for money. So this is the reason why the dugongs are endangered. Dugongs are endangered because sharks, crocodiles and killer whales hunt them for food.Also entanglement in fishing wire and nets, coastal development and pollution is a major problem. Aboriginals are playing a large part in culling and hunting dugongs for meat, because it's their hunting right.ecause their predators eat them and human beings kill them for money. So this is the reason why the dugongs are endangered. Dugongs are endangered because sharks, crocodiles and killer whales hunt them for food.