HUH? In a cave?
Quote from pet education
"The Seriatopora Bird's Nest Coral is also referred to as a Needle, Finger, or Brush Coral. The genus name, Seriatopora, comes from the Latin Seriatus (arranged in a series) and porus (pore) because its calcium skeleton is composed of a series of pores making up the whole structure. It is a small polyp stony (SPS) coral with very delicate, thin branches with needle-like tips that differentiate it from its closest relative, the Staghorn Corals that have much thicker branches. It is found in a variety of color forms with pink being the most common. It will change colors in the reef aquarium growing darker with age. Aquacultured specimens are available.
The Seriatopora Bird's Nest Coral needs a high light level and a medium water current within the aquarium to maintain its bright colors. For continued good health, it will also require the addition of calcium, strontium, and other trace elements to the water.
While it does not require additional food to maintain its health in the reef aquarium, it will feed on micro-plankton and foods designed for filter feeding invertebrates. Many scientists and hobbyists have recently cultured young Bird's Nest Corals by fragmenting a mother colony and raising the small branches in impeccable water conditions under intense lighting."