-Animals (Kingdom Animalia)

-Cnidarians (Phylum Cnidaria)

-Sea Anemones and Corals (Class Anthozoa)​

-Hexacorallians (Subclass Hexacorallia)

-Zoantharians (Order Zoantharia)

-Suborder Brachycnemina

-Family Zoanthidae

-Genus Zoanthus

Zoanthus are a genus of corals within the order Zoantharia that are often found in association with other marine invertebrates, including corals, in shallow and deep-sea environments. Zoanthus are photosynthetic corals. Residing in their flesh are a symbiotic dinoflagellate called zooxanthellae that carries out photosynthesis.