Blastomussa merleti and wellsi. Common name = pineapple coral According to "Aquarium Corals", Eric B says the B. wellsi can be distinguished by its corallites and polyps. They have a larger diameter of 4-5 inches, which is more than twice the size of B. merleti at mature size. He also indicates B. merleti forms long, tubular corallites that are brittle and easily broken from healthy specimens to form new colonies.
playa as always a real treat to see your tank. i got some red n green such as yours on the way next week, i also have what i consider a real score as well.... pink blastos!!! ill post new pics of thoes once they get here