Crabs are animals belonging to the phylum Arthropoda, class Malacostraca, order Decapoda, and suborder Brachyura.Crabs are crustaceans with their bodies protected by hard shells.Crabs breathe using gills.In biological classification, crabs are related to shrimp, lobsters, and hermit crabs.Most crab species live in the sea or near the ocean, but some also reside in fresh water or on land.They rely on their mother for reproduction, with each female crab producing millions of eggs.Crabs use Earth's magnetic field to determine direction.The history of eating crabs in China is long-standing, as mentioned in texts such as "The Book of Rites. Five Sessions" and "The Book of Documents. Officials of the Kitchen."
