Bright yellow with zooxanthellae and long tentacles.Zooanthids are extremely hardy and an excellent beginner coral. They can spreadrapidly so care must be taken to ensure they don’t choke out other corals.Zooanthids are photosynthetic and don’t need special feeding.Zooanthids prefer low to moderate water motion.Does well within a range of at least 76º to 84º F.Will tolerate very low light levels, but do better with stronger lighting.Often referred to as "Zoos" Button Polyps are very easy to care for and great foreveryone from beginner to expert. They grow and spread very quickly and can beeasily propagated.Corals are part of a biological group known as Cnidaria. Most Cnidaria have a mouth,or mouths, that opens into one big body cavity. Due to the lack of a true digestivesystem, this cavity acts in its place and after the food is broken down thenutrients are then sent through the rest of the body as food. There is also noexcretory system; therefore the waste is sent back through the mouth or secretedinto the surrounding water.Tentacles of varying size will usually surround the mouth of Cnidaria. Most Cnidariahave tentacles with stinging cells that can shoot tiny poison darts into their preyor can even be used as a defense mechanism. Some corals lack tentacles and insteadcover themselves with a thin layer of mucus and use that to collect bacteria andplankton as food. Some corals even use both of these methods. Cnidaria can either beanindividual animal or members of a complex colony. These "Colony Corals" share thefood and nutrients taken in by each individual.Corals have tiny living organisms that actually live in their tissue. These arecalled zooxanthellae and they are the reason why such strong lighting is needed inthe saltwater aquarium. These algae-like creatures provide the coral with oxygen andother nutrients that are produced during photosynthesis. During this process, thezooxanthellae take up carbon dioxide and provide nutrients to the coral.
