The shark (superorder Selachimorpha) is a type large carnivorous fish characterized by five to seven-gill slits on the sides of the head, and pectoral fins that are not fused to the head. For the second task of the Triwizard Tournament in 1995, Viktor Krum partially transfigured himself into a shark to complete it. The Dukuwaqa, mascot of the Fijian National Quidditch team, is a magical creature capable of shape-shifting between the forms of a shark and a human. A shark is one possible corporeal form of the Patronus Charm.