Mine only swims in the open water during feeding.
I do have a lot of rock work in my tank, but have many caves and overhangs, because of this there is a number of areas where he will stay covered above by rockwork, but still in sight. This is the best tank set-up for this type of fish if you ever want to see it.
Mine has the orange stripes, and if your lighting is good the base of the body will appear a light purple. If your lighting is not that great they generally appear to have more of a silver base. Of course the actual fishes coloring sometimes are more or less striking as well.
One of my favorites, but not a fish that is going to be out front and showing off all of the time.