Mussie, also known as Hapyxelor or Hapaxelor, is a cryptid, an animal whose existence is the subject of folklore but has not been proven, that is rumored to live in Muskrat Lake in the Canadian province of Ontario. The creature's age, gender, and physical appearance are not agreed upon; it is variously described, for example, as a walrus or as a three-eyed Loch Ness Monster-like creature. It is also not agreed upon whether Mussie is a single creature or a species.