Crustaceans, Various

Crabs and other crustaceans belong to the phylum Arthropoda, the most widespread and numerous group of animals on the earth. Arthropods are invertebrate (no backbone), have a hard exoskeleton, segmented bodies, and jointed legs. We are quite familiar with what a crab, remembering that a Horseshoe Crab, although an arthropod, is not actually a crab.Crustaceans include the “true crabs,” as well as Hermit Crabs, Mole Crabs, shrimp, and lobsters, and their further classifications is based on sometimes subtle differences in body form and leg placement. Barnacles may look more like mollusks, but are actually sessile (fixed or unmoving) crustaceans.

Leave a Reply