The term corals is referring to the invertebrate animals or marine invertebrates that is part of the class of Anthozoa and belongs to the family of a large group of fascinating and colourful animals called as Cnidaria. The Cnidarians are usually found in the rock pools and on the beaches, and aside from the corals or coral reefs, some other examples of the Cnidarians are jelly fish and sea anemones. The similar characteristics of the coral or coral reefs include a single mouth opening, stinging tentacles and a simple stomach; but they typically differ in shapes, colour and sizes. The two kinds of coral reefs or corals are the stony or hard corals which can also be called as the reef building corals; and the other one is the soft corals, such as the sea fans, sea feathers and the sea whips. The common characteristics of the soft corals include cores that are wood-like for support and fleshy rinds to protect them from other organisms; and the difference between them and the hard or stony corals is that they do not have the calcareous skeleton that are rock-like in texture. The primary needs of the corals to grow healthily and to survive include warm water temperature, for it requires such temperature level in order for them to grow; sunlight, for most of them are growing in shallow water and they only depend their oxygen supply to the algae or zooxanthellae; saltwater, for they require a certain balance in the amount of salt to the water; clean waters, for this animals are sensitive to sediments and pollution; and clear water, to let the sunlight through.
There are definitely a lot of sellers of coral reefs or corals, but one of the best sellers of the said invertebrate animals is the Chaos Aquaculture and they basically sell their products in the internet. The corals or coral reefs that the Chaos Aquaculture are selling are their own products for they grow and farm them on their very own warehouse. The said company is actually composed of a group of people that have the same interests, passion and vision when it comes to coral reefs, and they typically make sure that the products that they offer are all healthy. The Chaos Aquaculture has their very own website where their customers can order their products online, and some of their products include aquarium supplies, Pineapple corals or blastomussa, scolymia or doughnut corals, acropora, stylophora, montipora, softies or soft corals, frag packs, and mushroom corals.