According to the inquiry of Dr. official website of Bohe, crab refers to crab. Crab and lemon can't be eaten together, because lemon contains more fruit acid, while crab contains more protein. Fruit acid will coagulate protein, making it difficult to be digested by gastrointestinal tract, prone to abdominal pain, and will also affect the nutritional value of crab. Lemon can't be eaten with any seafood, nor can it be eaten with milk, because fruit acid will also combine with calcium to form tissues that are not easy to digest.