Answer the following question: Ischnacanthus - Ischnacanthus is an extinct genus of fish in the class Acanthodii. Ischnacanthus lived during the Early Devonian period. Ischnacanthus has jaws but still retains small mosaic scales. They either had very small teeth or none. Fossils were found in Tillywhandland Quarry Forfar Scotland. Some species were of large size up to 2 m in length. 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?
Answer:
Animal