Konstantin on Instagram: "Alcyonacea 🌿 . Alcyonacea (Latin Alcyonacea) is an order of coral polyps from the Octocorallia subclass. Colonial organisms, the skeleton of which is represented by calcareous elements lying in the mesoglea. They live in nutrient-rich water with less intense light. Almost everyone uses symbiotic photosynthetic Symbiodinium as their main energy source. However, most of them willingly feed on plankton. They are an integral part of the reef ecosystem and provide habitat f