The Green Doughnut Coral is a large polyp stony coral, which is also commonly referred as Cat?s eye, tooth, doughnut, teary eye, or meat coral. It can be one of the largest corals found in the wild, and resembles an artichoke in appearance. The Green Doughnut Coral is non-aggressive in nature, but like most corals, requires adequate space in the tank to expand themselves properly. It features sweeper tentacles that help the Green Doughnut Coral in feeding. It has a perfect amalgamation of hardiness and ease of placement, which makes it an excellent choice for a beginner aquarist. Medium light and low water movement allows for very diverse placement of the Green Doughnut Coral. It may benefit from the addition of calcium, strontium and other trace elements to the water. Supplemental feeding of brine shrimp or micro-plankton is also very important for the Green Doughnut Coral to thrive well in the tank. Its beautiful color adds a splash of vivid green color in the aquarium.
Many color and texture variations. One of the largest single-polyped corals. Other common names include Meat Coral, Tooth Coral, Cats Eye Coral. This colorful coral has thick, opaque tissue and the skeleton may have a diameter of up to 15 cm. The skeleton has thinner septa than some of the other members of this species.Place this coral in the sand bed or low on the reef. Provide light flow around this coral indirectly.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 bean individual 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.Corals can use two different types of defense mechanisms. One of which is a sweepertentacle wherein the coral reaches its tentacles out to try to damage another coralwith nematocysts. The other is when the coral releases a minute amount of toxin intothe water to poison another coral within certain proximity. Most "Hard Corals"should not be placed within reach of another coral.