Along the lines of Steve's suggestion, a "fish skeleton" inlay could be in interesting look.
A luthier buddy of mine sent me a little piece of shower surround, which you can get at home improvement stores, which is another (very reasonably priced) source of white (and almond) thin plastic sheets.
Impressive list of responders. Now that I am posting, there goes the neighborhood.
"First you master your instrument, then you master the music, then you forget about all that ... and just play"
Charlie "Bird" Parker