Differences among colonies inhabiting deep and shallow areas. A. Colonies in shallow areas (left), compared to deep colonies (right) are more branched and bigger in size. Thicker colonies are found in shallow areas with smaller spindles and more polyps per area (B and C). Right showing differences among sclerites; club (D), capstan (E), spindle (F) and spindle close up (G) of colonies inhabiting shallow (left) and deep (right) areas. Spindles of shallow area colonies compared to deep colonies are bigger in size. The surface arrangements of warts are sparser in shallow area colonies (G).