The Alcyonarian corals are organisms resembling the octocorals (sea pens). This individual polyps formed colonies and bore sclerites. The Burgess shale organism Margaretia resembles an Alcyonarian, but is not firmly classified as one. Otherwise their fossil record can be traced back to the Cretaceous.
NIGHT ISSUE: NIGHT OF THE HUNTER ; Photographer Jeffrey L Rotman Ventures into the Extraordinary World of the Coral Reef after Dark
Jan 26, 2002; When night falls, the coral reef is transformed into a fantasy world that challenges even experienced divers who know the reef...