Crabs eat the meat and the yellow inside. The lungs and stomach in crabs must not be eaten. The lungs are things that look like brushes and brush heads on both sides of the hood. The stomach is a food bag, usually on the middle side of the lid and close to the mouth. As for picking crabs, we must pick heavy and fresh ones. The two tips of the lid should be solid but not empty, and the crab back should be thick. for reference only