Source: File:Corallium rubrum 1.jpg
Source: Balanus glandula Darwin, 1854
Source: Image courtesy of Lophelia II 2009: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks, NOAA/OER.
Source: Lophelia II 2009: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks, NOAA/OER.
The pinkish coloring is the hemoglobin-containing red blood showing through the translucent white epidermis of the trunk. Blood vessels extend into the tentacles, but that's difficult to see in these green-tinted lophophores.
Source: Ken-ichi