The Chinese mitten crab, Eriocheir sinensis, has been widely introduced into many regions outside of its native range in China. As a result, it has been placed on the International Union for Conservation of Nature's (IUCN) list of the world's worst 100 invasive alien species.It has conspicuous setal mats on its claws and both its British common name, Chinese mitten crab, and its scientific name, Eriocheir sinensis, which means ‘wool hand, the Chinese’, originate from this distinguishing feature. It is the only crab in Britain that has this.