Please answer the following question: Saurostomus -  Saurostomus is an extinct genus of prehistoric bony fish that lived during the early Toarcian stage of the Early Jurassic epoch. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Animal