The genus Acropora has over 20 species. This fits many of the acropora species but other forms are shaped like tables, bushes or are a clustering coral. Table acropora has short branches that reach upward to form a flat table-like structure. The surface of the table is perfectly flat in nature, so when placing it in the aquarium, make sure it is as flat as you can get it.
Bushy corals have many tightly compacted branches and look bushy.
Clustering acropora grows in various sized clusters that resemble cauliflower and is sometimes bumpy. Staghorn acropora has distinct branches that look like antlers. Acropora comes in all kinds of colors but can change dramatically depending on the environment. A green coral at the dealer may well turn out brown after it has been acclimated to your aquarium. Likes medium to strong water movement, prefers turbulent flow.