Vivid's Neon Green Pipe OrganHow to Care for Green & White Pipe Organ Coral: (written by Dave Burr) Although Vivid's Neon Green Pipe Organ Coral does have a red skeleton it is actually classified as a soft coral. It is often confused with Star Polyps. Unlike Star Polyps, it will not encrust the rocks and crowd out other coral species. It is a good coral to use to fill in gaps between other peaceful corals as it will not sting. Placement: Mount the Vivid's Neon Green Pipe Organ