The Blastomussa coral is a large polyp stony (LPS) coral. It is often referred to as a "pineapple coral." A striking coral to behold, Blastomussa corals appear in shades of red and green, but can appear mottled with other colors as well. There are 2 types of Blastomussa corals, the Blastomussa merletti and the Blastomussa wellsi. The main difference between the Blastomussa merletti and the Blastomussa wellsi is the size of the polyps. A Blastomussa merletti has smaller polyps which will usually max out in size at 1 inch in diameter. A Blastomussa wellsi has larger polyps that will range in size from 4 to 5 inches in diameter. Both species of Blastomussa coral require similar care.