Crustacean

+Crustaceans are a vast subphylum of [Arthropods](/wiki/arthropod), primarily aquatic invertebrates known for their segmented bodies and hard exoskeletons. From tiny copepods to large [Lobsters](/wiki/lobster), they inhabit diverse environments, playing vital roles in marine and freshwater ecosystems worldwide.

+## See also

+- [Invertebrate](/wiki/invertebrate)

+- [Decapod](/wiki/decapod)

+- [Barnacle](/wiki/barnacle)