The most expensive shrimp is the Australian blue lobster. The rare breed of Australian blue lobster is one of the largest lobsters in the world, with individuals up to 6 kilograms. It has a dark blue shell, hence the name blue lobster. In addition to its size, the Australian blue lobster is best known for its delicious meat and unique taste. The meat is firm and delicate, and has a mild sweetness that makes it a favorite for both sashimi and cooking. Due to its rarity and excellent flavor, the Australian Blue Lobster is very expensive. A medium-sized blue lobster can often cost several thousand dollars, and for extra-large blue lobsters, the price can reach tens of thousands of dollars. The most expensive crab is the Alaskan king crab: the average weight is 10 kg and the average length is 220 mm. The shell can be up to 28 centimeters wide, and the legs can reach 1.8 meters when fully spread. Because of its long, robust legs, it is the only crab that can crawl both horizontally and vertically. The dark red shell has an oblique round body and is covered with hard spines. The legs are long and thick, characterized by a fan-shaped tail. There are five sets of appendages, preceded by a pair of chelae, the right of which is slightly larger than the left. The last appendage is used for mating. Alaskan king crab body size is huge and the flavor is very fat, but because of the difficulty of catching unless high, the production is very rare, so in the world's most expensive crab ranking in the first place.