Cute and playful, but not without controversy: the large, richly illustrated portrait of the otter. This book covers the remarkable comeback of a nearly extinct animal, addressing its history, biology, and ecology. The otter has had a tumultuous century. Initially, it was rigorously hunted. When it became extinct in many areas, the otter became a symbol of endangered nature. However, as its situation improves, it has once again become unpopular in some circles as a fish predator. The species seems to evoke strong feelings in everyone. But what do we actually know about the otter? With its primarily nocturnal and secretive lifestyle, it largely eludes observation. This book presents the biology and ecology of the otter. It describes its way of life, outlines the history of its extermination and return, and discusses the challenges associated with it.