Sea red crab, also known as red crab, is a kind of sea crab. This crab's abdomen and leg edges are slightly red, hence its name scarlet or scarlet. Its head and breastplate are oval, its shell is hard, its claws are thick and fierce. It likes to live in rocky areas with low water level and areas with dense algae. Rushan area is rich in rocks, algae and bait, and it is the main breeding ground of red beetle. Red crab is big and tender, delicious, and contains a lot of protein, fat, carbohydrates, inorganic salts, vitamins A and B, etc. , and rich in nutrition. Local fishermen catch red beetles and often trap them in crab cages. The coastal area of Jiaodong is the main breeding area of Chi Jiahong. Bohai Bay is rich in marine microorganisms and nutrients, and the crabs produced here are particularly delicious.