Blair if you have a SLR with a flash that has adjustable tilt then try bouncing the flash off the ceiling at an angle. When I flashed it straight on the fish the blues get washed out in the pic, but when I bounce it off the ceiling it shows the blue better as well as all the other colors.
The other fish was just in one of the assorted/mixed African tanks so they didn't know exactly what he is for sure, but Cobalt blue/blue zebra was my thought as well. Although I'm still not very good at identifying species yet myself. I usually get maybe 10% correct lol