Fish-man of Lierganes is a legendary cryptid from the mythology of Cantabria, the fish-man of Liérganes is an amphibian human-looking being, that looked like a metamorphosis of a real human being who was lost at sea. His story was examined by the Enlightenment writer Benito Jerónimo Feijoo, that somehow claimed if the story of the fish-man of Liérganes was true.