Five. According to the inquiry, one crab in the market is about 50 grams, so there are about 5 crabs with 258 grams. The positive crab is the swimming crab, which is called seawater crab in Fuzhou, Fujian and other places, and is a relatively high-grade seafood. One of the sea crabs with good taste. Portunus is cold and salty. Portunus contains arginine. Eating crabs in moderation can promote the energy balance of the body.