The Pipe Organ Coral, Tubipora musica, is a soft coral, but due to presence of red calcareous skeleton, it is referred to as hard coral. Due to similar apprearance, the Organ Pipe Coral is sometimes confused with star polyps or flower polyps. It doesn't get spread across the rocks and doesn't crowd out other species. Since it lacks sweeper tentacles, the Pipe Organ Coral is considered safe and can be placed near other corals. It requires moderate light level, along with a medium water movement within the aquarium. The Pipe Organ Coral is docile and fragile, and should not be positioned in currents which could displace or damage it. It also requires calcium, iodine, strontium and other trace elements for its continued good health. The Pipe Organ Coral undergoes photosynthesis with the help of zooxanthellae that dwells inside its tissue, and manufactures food and energy for it. Apart from the photosynthesis, additional food such as phyto and zooplankton or baby brine shrimp for its continued good health. The best way is to keep the Pipe Organ Coral at the bottom of the tank.