  Iridophore networks in the skin of neon tetra fish are investigated for use
as biologically sourced, tunable, Bragg reflector arrays. This paper reports on
a method for immediate and fast post-processing of tissue to modify the
structural color of iridophores found in the lateral color stripe. Conditions
for fixation as well as the environment post-fixation to improve longevity of
the structural color are also presented. Recent results from attempts to
further increase the lifetime of post-mortem iridophore color through
infiltration and embedding in low-acid glycol methacrylate are also discussed.
