The sea pens (Pennatulacea) and blue coral (Helioporacea) continue to be assigned separate orders, whereas the current order Alcyonacea was historically represented by four orders: Alcyonacea, Gorgonacea, Stolonifera and Telestacea.
The sea fans (Pennatulacea) and blue coral (Helioporacea) are still classified under distinct orders, whereas the current order Alcyonacea was previously comprised of four orders: Alcyonacea, Gorgonacea, Stolonifera, and Telestacea.