In Briareum violaceum, which is often sold - including by us - under the synonym "Pachyclavularia", all tissue is instead distinctly purple. The polyps clearly show why this species belongs to the Octocorallia, the eight-stranded flower animals - they each have eight pinnate tentacles.
Briareum are popular soft corals for aquarium care because they are very easy to keep, have an attractive green coloration and move in the current. They have few water quality requirements and like increased nutrients, tolerating weak to stronger lighting and strong currents. They can reproduce quickly and tend to proliferate if conditions are right, which is something to be aware of when placing them. After stress, the polyps can sometimes remain closed for several days, but as long as the coral is not in the process of dissolving, it is usually still alive.