Actinozoa is a term used to describe a group of marine organisms, commonly known as corals. Synonyms for the word actinozoa include Anthozoa and Zoantharia, which are also used interchangeably to refer to this group of marine invertebrates. Anthozoa is derived from the Greek words, anthos meaning "flower" and zoa meaning "animals". This is because corals have a flower-like appearance when viewed from above. On the other hand, Zoantharia is derived from the Greek words zoos meaning "animal" and anthos meaning "flower". Both terms are used to describe the same group of coral organisms and are commonly used in taxonomic classification and scientific literature.