Belongs to. There are two types of crabs, namely river crabs and sea crabs. Among them, hairy crabs are a species of river crabs, so river crabs are hairy crabs. River crabs, also known as Chinese mitten crabs, are widely distributed in lakes, rivers and other places, while hairy crabs are widely distributed in the Yangtze River system in my country and have the most delicious taste. The scientific name of river crab is Chinese mitten crab. In my country, it is widely distributed along the long coastline from Liaohe River in the north to the Pearl River in the south. Among them, the Yangtze River system has the most delicious taste.