属于十足目，蜘蛛蟹科，国内分布于南海, 东海, 山东半岛, 渤海湾, 辽东湾。生活于海水，栖息于低潮线, 有水草、泥沙的水底。
学名:Pugettia quadridens
英文名:Four tooth crabs
This species belongs to the family of Majidae,order of Decapoda.Distributed in the South Sea, the East Sea of China, Shandong Peninsula, Bohai Bay, Liaodong Bay.They like to live in the sea, and inhabit in the low tide line with plants and sand.