Lots of complaints about coral pics in this thread, many are well founded but a few appear to be based on misunderstandings.
First, corals will never look the same under your white lights as they do under the vendors blue lights. It doesnt matter if your white lights are fancy schmancy $900 lights -- they still wont look like corals under blue lights. Turn on just your blues if you want to compare with the vendors' blue pic.
Second, you've got to use a filter if you're taking pictures of aquariums, or everything just look blue with a hint of green. Vendors arent "photoshopping" or "oversaturating" to get these colors -- they're using the proper filters for the light. Of course the customer's cell phone pic taken without a filter isng going to look like it.
Please don't get me wrong. I'm not defending the faked pics that are all too common, or the LOL price tags that are attached to them. I'm just saying that the vendors pics don't just look better because they cheated, they look better because of how they were taken (i.e. under the right light with the right filters to best show the corals' colors). As a seller, I always show both white light and blue light pics, and consider that a reasonable standard to hold all vendors to.
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You want something to really complain about with vendor photos? A real dishonest practice? Photoshopping out the background. This is a dead giveaway - they are hiding color manipulation. If you manipulate colors, the white egg crate isnt white anymore. So they solve this by photoshopping out the background and showing the coral on a pure black (fake) background. This is a problem. Using blue lights and filters is just good aquarium photography practice.