In Islam, crab is considered as an unclean food, because its legs and shells are hard and have a hard shell, so it is considered inedible. In addition, in some Islamic regions, eating crabs is also considered as an act of disrespect for religious beliefs.

Therefore, to eat crabs, Muslims need to abide by some specific rules and regulations, such as using halal food certified processing plants to treat crabs, cooking crabs, removing crab feet and shells, and so on. At the same time, we should also avoid eating unapproved seafood products or foods containing seafood ingredients.