Is crustaceans the same as arthropods?

Yes, crustaceans are a subgroup of arthropods. Arthropods are a diverse phylum that includes insects, arachnids, myriapods, and crustaceans, all characterized by their exoskeletons and jointed appendages. Crustaceans specifically include animals like crabs, lobsters, and shrimp, which primarily live in aquatic environments. Thus, while all crustaceans are arthropods, not all arthropods are crustaceans.