Pigment cell patterns in single and double mutant adult zebrafish. Genotypes are indicated in the upper lefthand corner of each panel. Black arrowheads point to gold iridophore stripes, or gold iridophore regions in the case of leo mutants; white arrows point to melanocyte/silver iridophore stripes, or spots in leo mutants. Subjects in A-F and I were photographed with indirect daylight (to reduce glare), but which also fails to clearly illuminate silver iridophores. Reflection of a nearby tungsten source in G and H allowed for better visualization of silver iridophores. Regions shown are higher magnification of boxed regions in D and E, but from different individuals. Note absence of scale-associated (epidermal) melanocytes in dorsal third of spa mutants (B, E, F) and absence in ros mutants of most iridophores (C, F, and I, arrowhead indicates single band of gold iridophores that persist in ros mutants). Scale bar, 1 mm (panels H and I).