It is also known as the Shanghai hairy crab, and it is native to rivers, estuaries and other coastal habitats of eastern Asia from Korea in the north to the Fujian province of China in the south. They have a smooth, round carapace (top shell) that is a maximum of 3 inches wide. Chinese mitten crab, known as Chinese hairy crab, is named for its furry claws. Chinese mitten crabs are medium-sized crabs named for their hairy, mitten-like claws. Their legs are generally twice as long as the width of the carapace, which has an average maximum width of 80 mm. They can cause damage to fishing gear and river banks, block intake screens, modify natural habitats and compete with native species. Between 1998 and 2000, catches reached 100,000 - 800,000 crabs per year in some parts of San Francisco Bay but has gone undetected since 2010. Chinese mitten crabs are light brown and have hairy claws that are typically white-tipped, giving the appearance of mittens. Mitten crabs range in size from 5-10 cm across the top shell and they have 4 lateral spines on each side of the shell. The "Mitten Crab Watch" website provides information on the invasion of the mitten crab and allows users to more easily report catches. Mitten crab live primarily in fresh water, but migrate to the sea to breed. In late summer, four and five year olds move downstream to mate in tidal estuaries. Chinese mitten crabs are most recognizable by their brown, spiny shells and furry “mittened” claws. They have a notch between the eyes and 4 lateral carapace spines. The Chinese mitten crab is a medium-sized burrowing crab that is named for it’s furry claws, which resemble mittens. Their legs are generally twice as long as the carapace is wide. It’s called the Chinese Mitten Crab (Eriocheir sinensis). Chinese mitten crab, Eriocheir sinensis. A Chinese mitten crab found in Chesapeake Beach, Maryland, in 2007. These crabs are yellowish brown and have six walking legs and two claws that are covered in furry fuzz (the male’s claws are especially fuzzy). We need your help to detect and assess the status of Chinese Mitten Crabs. Impacts. Females with eggs externally attached then travel to the sea and remain a few miles offshore for several months during winter. The burrowing activities of Chinese mitten crabs cause damage to dikes, levees, and stream banks and increase erosion, which can cause weakening or collapse of flood control and water supply systems. The Chinese Mitten Crab (Eriocheir sinensis) is native to East Asia and is considered an established invader in Europe and the United States.The first established US population was in California’s San Francisco Bay and Delta in the 1980s. Please help us detect live mitten crabs by reporting any sighting in North America. The crab inhabits rivers, estuaries and coastal lakes across Northeast China’s Yalu River where is the border between China and North Korea, to Chiu-lung River in South China’s Fujian province. While we are not certain how the crab arrived in New York, it is most likely that it occurred through live release or transport in ship ballast water. Chinese mitten crab (Eriocheir sinensis), also known as big binding crab and Shanghai hairy crab, is a medium-sized burrowing crab native to rivers and coastal estuaries of China and Korea. Chinese mitten crabs are on California’s list of restricted animals and cannot be imported, transported, or possessed without a permit. General Description . Other articles where Chinese crab is discussed: migration: Lower invertebrates: …freshwater crabs, such as the Chinese crab (Eriocheir sinensis), after remaining for three to five years in fresh water, migrate to brackish water, where mating occurs. 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chinese mitten crab facts

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