SPS Corals
SPS (Small Polyp Stony) corals are the major reef builders in the wild. They form the prominent reef structures that most people associate with reefs. SPS coral polyps are relatively small and inconspicuous compared to the coral skeleton. SPS corals grow in many different forms and it is the skeletal growth pattern and shapes of the corallites (skeletal housing for individual polyps) that is primarily used to identify these corals.