The branches, reaching a length of some 10 to 12 inches [25 - 30 cm], are solid calcareous deposits secreted by whole colonies of these organisms to protect themselves.
Korallide 25 – 30 sentimeetri pikkused harud koosnevad kõvast lubjast, mida on eritanud terved kolooniad enda kaitsmise eesmärgil.