I went to the Georgia Aquarium night at Dragon*Con, and toward the end of the night, Christa was able to get this wonderful shot.
This version of Ariel's costume is based on the theme park costume and merchandise, where they've stuck her in teal, which I love.
Edit: Whoa a showcase! Thanks so much for the comments, guys; it's kind of awesome that a project that was sort of purely for my own entertainment gets this kind of reaction. And be sure to check out the larger versions of this photo at Christa's flickr account, because that aquarium really is stunning: