Very special thanks for the fotos to George "Keoki" Sender, Hawaii.
Characters: Colonies form irregular mounds or are openly branched. Branches are tall and upright, almost cylindrical in section, becoming flattened towards the tip.
Verrucae are elongate but are of irregular size and are irregularly distributed on branches.
Habitat: Shallow rocky foreshores, Found in shallow water with strong wave action
Abundance: Uncommon except in the far eastern Pacific.