Why are crabs Arthropod?

Crabs are classified as arthropods because they belong to the phylum Arthropoda, which is characterized by a segmented body, an exoskeleton made of chitin, and jointed appendages. Like other arthropods, crabs exhibit molting behavior, shedding their exoskeleton to grow. They possess a hard carapace, which provides protection and support, and their diverse adaptations allow them to thrive in various aquatic environments. Overall, their structural and functional traits align them with the defining characteristics of arthropods.