| Lobsters, like all animals with exoskeletons, periodically shed their armor as they grow. |
| Fish eat snails in their shells and hard-shelled crustacea as well as invertebrates with exoskeletons. |
| The ocean surrounding Australia is home to several species of sea urchins, which form elaborate exoskeletons made from carbonate minerals. |
| But crabs and other animals that periodically shed their hard shells, or exoskeletons, face just such a predicament. |
| By any measure, decapods are underrepresented in the fossil record by comparison with organisms with more heavily calcified exoskeletons. |
| Indigestible materials like fur, feathers and insect exoskeletons, if swallowed, are regurgitated in a pellet. |
