Esophagus of Leatherback turtles showing backward pointing spikes. Adult leatherback sea turtles subsist almost entirely on jellyfish. Jellyfish are pretty slippery, you see, and the razor-sharp rows of papillae prevent them from slipping out of the turtle's mouth.
#LeatherbackTurtles can trace their evolutionary roots back to before #dinosaurs walked the Earth #FunFact! Read about our work with leatherback #turtles here: http://www.fauna-flora.org/species/leatherback-turtle/