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 ...

Dr Fraser says "Turtles are very strange animals. They have a straightjacket of a shell. "If you can imagine yourself with your shoulders within your rib cage, you'd be pretty restricted." ...

Gastropods, such as sea snails, have one outer shell while bivalves, such as oysters, scallops and mussels, have two. As they grow, these animals use proteins and minerals to build their shells ...

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.

These included brachiopods, which lived in shells resembling those of clams or cockles, and animals with jointed, external skeletons known as arthropods—the ancestors of insects, spiders ...

By reducing the acidity of surrounding waters, seagrass ecosystems help protect animals with shells or external skeletons. In the sunlit surface layer of oceans Like land plants and seagrasses ...