Commentaire : Corallum free-living. Each coral with several mouths. The outline of the coralla varies from irregularly circular to slightly oval. The coralla are usually thin, they vary from flat to highly arched. All stomata are distinct. They are unevenly distributed. The primary stoma is usually located at the centre, with the secondary stomata around it. Maximum length of the coralla up to 65 cm. The septa are loosely packed and straight. The septa of lower orders are thicker and more exsert than those of higher orders. All septa are highest near a mouth, where they support a tentacle. The septal margins are coarsely ornamented with irregularly angular and sharp dentations. Their number varies from 15 to 35 per cm. The corallum wall is perforated and its lower surface is covered with granulations. The costae may differ in thickness and height. They are straight and distinct near the corallum margin, but become less prominent near the centre. All costae are coarsely ornamented with cone-shaped spines which are granulated at the tips. The animals are usually ochre-like brown with a violet margin. The mouths are white.
Protection : basse