Soft Corals, which are also known as Alcyonacea, are a favorite among beginners and new hobbyists due to their ease of care and spectacular, colorful structures. However, unlike their stony coral relatives, soft corals do not build an internal fleshy / woody skeleton that bolsters the appearance of the reef.
These flexible corals bend with the flow of water to give them the appearance of waving blissfully in your tank. Soft corals generally prefer moderate light and are much more resilient to changes in chemistry within the tank, making them extremely hardy.
Almost all Soft Corals use symbiotic photosynthesizing zooxanthella as a major energy source, but will also readily eat any free floating food, such as zooplankton from the water column.