External morphology and polyps of Chrysogorgia carolinensis sp. nov. A the holotype in situ B close-up branches in situ C the holotype after collection D two polyps under a light microscope E tentacles under a light microscope F a single polyp under SEM G upper part of a polyp under SEM H basal polyp body under SEM I coenenchyme under SEM. Scale bars: 10 cm (B); 2 mm (D); 1 mm (E–G); 300 μm (H); 100 μm (I).