River crab belongs to the subphylum Crustacea, family Varunidae, and is a large crustacean with 21 segments.The adult crab has a dark green back and a grayish white underside; the carapace averages 6-7 cm in length and 7.5 cm in width.River crabs often burrow in mud banks of rivers, lakes, and marshes, are active at night, feeding on fish, shrimp, animal carcasses, and grains, migrating to river mouths for spawning in autumn each year, with hatching occurring from March to May the following year, after which they grow into juvenile crabs and migrate upstream.River crab meat is tender and juicy, making it a beloved food among people.River crab, known scientifically as the Chinese mitten crab, is considered an expensive freshwater product; it has a delicious taste, rich nutrition, and high economic value.
