Acanthastrea corals, commonly known as the Acan Coral or Acan Lords, are Large Polyp Stony corals, and one of the most beautifully colored soft coral species. They come in various shades of purple, red, green, blue, orange, brown, rust, or pale tan to pale grey. The family includes many species, which have a lot of different names and are touted by many as one of the easiest LPS corals to grow.