The invertebrate animals or marine invertebrates that belongs to the large group of colourful and fascinating animals called as Cnidaria and part of the class of Anthozoa are the corals, which can also be called as coral reefs. 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. There are two classifications of coral reefs, and they can be classified as a hard or stony coral that can also be called as a reef building corals and studies have shown that there are eight hundred species of them; or a soft coral, and some examples of them are sea whips, sea fans and sea feathers. The soft-type of coral is actually different from the hard ones for they do not possess any calcareous skeleton that is rock-like, and its other characteristics include cores that are wood-like for support and fleshy rinds to protect them from other organisms. Some of the most common needs of the coral reefs in order to survive are 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; clear water, to let the sunlight through; and warm water temperature, for it requires such temperature level in order for them to grow.
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 various products that the Chaos Aquaculture are selling include the scolymia or doughnut corals, acropora, stylophora, montipora, softies or soft corals, frag packs, mushroom corals, aquarium supplies, and Pineapple corals or blastomussa; and since they are online sellers they have their very own website where their customers can order.