Just like cheetahs and leopards, although they are similar in appearance, their families are different, one is the leopard family and the other is the cheetah family. Therefore, the relationship between king crabs and crabs is the same. One of them belongs to the Crab Family (four pairs of feet plus a pair of crab claws) and the other belongs to the Stone Crab Family (three pairs of feet plus a pair of crab claws).

King Crab, the largest crab in weight and size, lives in the cold sea far away from us. They are called king crabs because their blood is blue. In the eyes of Europeans, blue blood is a symbol of nobility, so they are called king crabs. As a high-class cuisine in seafood, the price of an adult king crab is around 1, yuan in China's market. The main reason for this high price is that the legs of the king crab are not only delicious in meat, but also rich in nutrition, and they are also a lot of feet.

The king crab has such a high price because its fishing cost is extremely high. On the one hand, the temperature in the living waters is relatively low, on the other hand, the powerful double claws of king crabs seriously threaten the life safety of crab catchers. There should be many people who know the reports about Alaska crab catchers. They only work for about one week a year, and they can earn about $2, to $1,, but their mortality rate is dozens of times that of ordinary workers. In the cold winter, every second of going out to sea is very dangerous. When the sea hits the deck, it will freeze immediately. Working for more than 2 hours every day can make people's spirit distracted, and it is easy to slip under their feet and fall into the sea. Moreover, the king crab's big pliers can cut off the thumb of an adult man in minutes.

The salvaged king crab must be sold alive, because the dead king crab will seriously affect its taste. The extremely large size of king crab brings very high logistics costs to people. Not only should they not be allowed to squeeze each other, but also the crab shells should be prevented from freezing and cracking at low temperature. The fishermen even invented an instrument to detect the heart rate of the king crab, which all doomed the high price of the king crab.