They're also some of the only animals that can breathe with their butts. You see, inside a turtle shell is a very particular respiratory system. Wojakowski: You will see the lungs towards the top ...

There are more than 400 different species of mantis ... with the initial strike to smash open the shell of a mantis shrimp’s prey, killing the animal inside. Remarkably, mantis shrimp are ...

Instead, hermit crabs have a hard exoskeleton on the front part of their bodies but a soft tail on the other half, which they protect using the discarded shells of other animals, like whelks.