Green tubastrea (black sun coral)

The Black Tube Coral is a large polyp stony (LPS) coral, also referred to as the Branched Black Tube or Tubastrea Black Sun Coral. It is a very dark olive green to black colonial coral, markedly different than others within the species. It is often found on reef ledges or steep reef slopes in the wild, where it feeds on drifting zooplankton. Its skeleton has tubes branching in all directions.