The term "Zoanthid", belonging to the Zoanthidae family, includes many species popular in the reef keeping world among hobby Reef Chasers and Pro Reef Chasers. Zoanthids are known by some as "carpet coral," "button polyps," and "zoas," and are considered soft corals. They appear as a single flower, but proliferate into glorious bunches of sea flowers and will often spread to cover rocks with their bright circles of colors. Zoas are relatively easy to keep alive and healthy, making them a common resident in most saltwater aquariums. Palythoas are very similar to Zoanthids and will often be found growing in close proximity.
It is important to note that some Palythoas contain a powerful neurotoxin called palytoxin in their flesh that can be extremely harmful when it comes in contact with your bloodstream. In some cases, exposure to the toxin although rare, can ultimately lead to death. For this reason take special care when handling Zoanthids and Palythoas - especially if you have open wounds on your hands or arms.