Blue crab, scientific name saw crab. It is delicious and nutritious. Sanmen County is the birthplace of blue crabs in Zhejiang Province and is known as the “hometown of blue crabs”. It is produced in the coastal areas, especially from Haiyougang to the serpent waterway. Coastal fishermen in Jiantiao have always used net catching. The locals call it “crabs and crabs”; the six-spot area is used as a “crab hole” to attract blue crabs into the clam shells, especially fat.