Keeping Zoanthids can be one of the coolest and most rewarding in the hobby. When it comes to keeping polyps in the aquarium they are hardy and very graceful. They are not that demanding in most marine setups, though it is found that better growth rates are in the more mature tanks. The colors available are as wide as the price range, which depends both on the color and the size of the frag. 
Polyp quickly turn into two, two to four and they just multiply till the place runs out, sometime they don’t allow other corals to grow by occupying their spots to grow. They grow in a colonial which look like mats, and over time it will cover their host rock completely. It is very important to read one last note; Some zoanthids are known to contain a substance known as palytoxin, which is one of the most dangerous organic substances in the coral reef and which can be highly poisonous to humans.
Commonly known as Zoanthids, Button Polyps, Zoas, Zoos they are fairly easy to keep and good for most saltwater beginners. They flourish in the temperatures of 75°F to 80°F (24°C to 27°C) with the calcium levels of 400 to 420 ppm.
Zoanthids are found in the most of the world ocean. They get most of food which they need from tank lighting and filter feeding on bacteria & other items in the marine aquarium water. The zoanthid which are bright coloured ones come from shallower water and the darker coloured polyps come from slightly deeper water. Polyps require moderate to high and turbulent flows of waters. Zoas can be eaten by – Angelfish, Butterflies and Foxface so try to avoid these fish species. Base of the polyps can be the host for dozens of pests like aiptasia, bristle worm, flat worm etc to avoid them reef dip and acclimatization is recommended.
