Veron will tell you flat out that acros's kept in reef tanks for long periods of time can not be ID to species levels even by him, with the coral in hand and a microscope. Tanks alter their growth structure to much from wild oceanic species. Corals are NOT ID buy the color or "flesh-like" appearance but by their skeletal septal arrangement. And there are other species of coral that look like that pic. Could it be a tenuis, yes but that does not mean it is.
To often in this hobby, me included, we ID many types of marine life to species level and often do not realize that said species ID is, for example, only found in the Med Sea but someone has +ID it, from a pic, as some species from the Indo of Australia.