Very special thanks for thr first photo of
Virididentula dentata to Keoki Stender from Hawaii.
Photo: Oahu, 80 feet, uncommon on shaded surfaces exposed to current.
Virididentula dentata is widely distributed in the Indo-Pacific.
Forms bushy tyffs that hang downwardss.Greyish but becoming deep blue when sunlit.
Zooecia rounded at their upper ends and armed with about four long spines.
Avicula commonly flanked each zooecium and resemble birds heads.
Source: eastern cape scuba diving