Small Polyp Stony corals, or SPS as they are often referred to in the hobby, serve as the main building blocks of the reef. As they grow and build up their calcium carbonate skeletons they expand the reef, effectively building a larger ecosystem for other corals, invertebrates and fish to reside in. Although they are often seen as the most challenging type of coral in the hobby, encrusting SPS can be just as easy to keep as LPS. The SPS category encompases many different species of corals that we’ve been collecting and farming for years to provide the hardiest, most colorful specimens possible. We strive to provide hundreds of options for you to choose from on any given day.