(http://img841.imageshack.us/img841/1301/otterback301.jpg) (http://imageshack.us/photo/my-images/841/otterback301.jpg/)
Nutria, (Myocastor coypus), which was originally native to South America, These animals were introduced to Europe and are now widespread.also called "otter" by the fur trade. Has a lighter coloured belly. Is also occasionally confused with the Bisam. Useful fur for dubbing, and also hair hackles etc.
http://en.wikipedia.org/wiki/Coypu (http://en.wikipedia.org/wiki/Coypu)