I hatch and raise yellow perch along with being a taxidermist. Fish 14 inches and over are sold whole frozen to fellow taxidermists all over the U.S. Anyway a friend that identifies water microorganisms for a living is taking close up pics of perch fry of various ages (At this size they grow 1 mm per day). Here's one I scooped out of the hatchery pond the other day.
Cool eh? You can just see the bar pattern starting to appear on this one.
Some more: