Answer the following question: Enneapterygius williamsi known commonly as the William's triplefin is a species of triplefin blenny in the genus Enneapterygius. It was described by Fricke in 1997. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Animal