To flying jaws… To flailing saws… From ghostly green eyes… Unbelievable adaptations…and unique mutations… Deep below the ocean’s surface live some of the strangest creatures and most frightening sharks on Earth. And the deeper you go, the more mysterious they get. In Alien Sharks: Greatest Hits, we’re recounting the biggest discoveries, weirdest adaptations, and most memorable moments from the past five years of Alien Sharks.