But its a species
Anyone who can refer to "coral" as a species clearly has such a strong grasp on biology as to not be worth paying attention to.
I'm not a biologist in any significant form, but I didn't spend a large chunk of a year learning to identify different classes and genera of coral as fossils (for dating the rocks in which their fossils are found) without getting the message that there have been many, many different species of coral. And I didn't get horrible sunburn the first time I snorkelled on a coral reef without realising that "coral" covers a LARGE amount of diversity. And so far we're only talking about morpho-species, which for-sure are a much coarser division of sessile framework forming Cnidarians than they use themselves. (Corals, if they think, probably don't differentiate much betweens any temporarily-marine vertebrates.)