Blastomussa should be somewhat easy to care for, so long as you keep in mind its lighting, water, placement, and feeding requirements. In general, the coral should be placed among rocky surfaces instead of sandy ones. It can be the centerpiece of an aquarium as it should be placed at the bottom of the tank. B. wellsi requires moderate lighting — as too much or too high lighting will cause the polyps not to open — but instead, close and recede. A low to moderate flow of water is necessary as fast-flowing water will cause the polyps to close. Finally, B. wellsi needs turbid, or cloudy, water conditions in order to thrive.
As stated before, its polyp growth creates a dome-like shape (some refer to B. wellsi as the “Moon Coral”) with individual polyps reaching 4 to 5 inches in diameter. These make a large surface area for B. wellsi’s nocturnal feeding habits. B. wellsi is a relatively aggressive coral species and has sweeper-type tentacles. These tentacles can extend at night and sting/attack other corals. For this reason, it is a good idea to keep B. wellsi isolated and away from other coral species. That said, B. wellsi serves as a shelter for animals such as sponges, mollusks, and other invertebrates, at least in the wild.
B. wellsi is often confused with Blastomussa merleti, or the “Pineapple Coral”. Though they are related, they are different species of the family Scleractinia incertae sedis. The easiest way to tell the difference between the two is polyp size. While B. wellsi’s polyps are usually 4 to 5 inches in diameter, B. merleti’s polyps are smaller, about 1 to 2 inches in diameter. Also, B. merleti has corallites that are tubular and long. Whereas B. wellsi’s corallites are slight more hardy, B. merleti’s corallites are brittle to the touch, and can easily be broken