What a great thread!
I was hired to shoot photos of some really amazing corals for this very reason - because I go out of my way to represent the corals I aim my camera at as accurately as possible. I know the importance of this not only for the seller, but for the buyer. Years ago I was duped myself a few times, and because of that I have vowed to ensure that every image I post is represented as seen in person. I double-verify the image is correct on the most standardized display platform currently on the market - Apple's "Retina" display. I do this with the final image from my iPad or iPhone, holding the device right up next to the coral I've just imaged before posting it. When friends come to my house, I ask them if what they are seeing in person is the same as what they've seen in my images online. The answer every time thus far has been a resounding "yes!", without hesitation.
I don't claim to be the best photographer in the industry, but I will claim all day long that my images are 100% accurate as to how they look in person. It doesn't matter what lighting is used. If you want to see how the coral looks under blue/purple-only T5s, I can show you that. Same with halide and LED - whatever the corals are shot under, and how they look under that lighting in person, is how they look in my images. My preference is actually to shoot under LED, as I can dial in a pretty natural spectrum in regards to a white/blue blend that is pleasing, and requires no color editing, and certainly no saturation editing, in post processing.
Cheers!