Unlike LPS corals, SPSs have thin skin that covers their skeleton that does not inflate, and that skin is made up of thousands of tiny polyps, all with one mouth each.
SPS corals need bright light, strong water movement, and are the least forgiving of any coral you can keep. They demand perfect water quality at all times and many parameters must be managed, including temperature, salinity, KH, calcium, magnesium, potassium, nitrate and phosphate, to name just a few.
Its SPS corals are the most vulnerable to coral bleaching events in the oceans, when temperatures are too warm for them for prolonged periods.