What animals are covered with cuticles?

Cuticles are primarily associated with certain invertebrates, particularly arthropods such as insects, crustaceans, and arachnids. These animals possess a hard outer layer, known as an exoskeleton, which serves as a protective cuticle. Additionally, some mollusks, like certain snails and slugs, have a calcareous cuticle that provides structural support. In general, cuticles serve various functions, including protection and prevention of desiccation.