Please answer the following question: Zoanthus sociatus - Zoanthus sociatus (commonly known as the green sea mat or button polyp) is a zoanthid usually found in shallow reef zones of tropical regions from Japan to Central America and the Caribbean. Z. sociatus is currently being studied for its use against human lymphatic parasites. 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