1, different families and genera: the king crab is a crustacean of the family Eriocheir, belonging to the Eriocheir, not a real crab. Bread crab is a kind of Chinese zodiac or steamed crab, belonging to the genus Crab.

2, the appearance is different: the king crab is brown and relatively large. Bread crab is brown and not as big as king crab.

3, the meat quality is different: the king crab is rich and sweet. The meat of bread crab is fresh and tender.