(Left) Pennatulida by Ernst Haeckel, Kunstformen der Natur, 1904

(Center left) Red coral Corallium rubrum, from Albertus Seba, Cabinet of Natural Curiosities, 1734-1765

(Center right) Sea Pen Veretillum cynomorium, from JVF Lamouroux, Histoire des polypiers coral - ligenes flexibles, vulgairement nommes Zoophytes, 1816

(Right) Soft coral Umbellulifera petasites, from JA Thomson and LMI Dean, Alcyonacea of the Siboga Expedition, 1931