The slow and gentle dugong has developed an interesting survival strategy to stay away from tiger sharks.
See more Tiger Sharks!
Tiger Sharks vs. Turtles:
http://video.nationalgeographic.com/video/player/animals/reptiles-animals/turtles-and-tortoises/shark_tiger_turtles.html?source=4002
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Dugongs vs. Tiger Sharks | National Geographic
https://youtu.be/Ql2bBzwJR7g
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