Crab.
Bullfrogs in the market cost more than 20 yuan per pound, and the cheapest crabs cost 25 yuan, so crabs are more expensive.
Crabs, also known as crabs (pángxiè): Kingdom Animalia, Phylum Arthropoda, Subphylum Crustacea, Class Mollusca, Subclass Euphylum, Decapoda, Asterocystis, Brachycephala . It is a crustacean (crustacean). Its body is protected by a hard shell and it breathes through gills. In terms of biological taxonomy, it is the same animal as shrimp, lobster, and hermit crab.