You’ve probably seen Leatherback turtles on documentaries before. They’re the largest of all living turtles, with their front flippers growing up to 2.7 metres and the mean size being anywhere from 250 to 700kg. These turtles feed mostly on jellyfish, but if you look inside their mouths, you might think they’re more suited to dine on humans.
You see, the Leatherback turtle has hundreds of jagged stalactites that line its mouth and esophagus all the way down to its gut. Leatherbacks need this funneling system to deposit their prey directly into their stomach because a jellyfish has hardly any nutrients at all and the turtle needs to consume almost three-quarters of its body weight every day.