Fig. 16-26. The shrimp, Grongon, is hidden because of its ability to match its background. The chromatophores 

 bring about a mottling effect which resembles the sand particles. In addition, it half buries itself to bring about 

 still further concealment. 



Fig. 16-27. The leopard frog changes from a light color where the spots are very prominent to a darker 

 color where the spots are obscured. The activity of the chromatophores which are responsible for 

 these varying colors is shown magnified in the lower figures which correspond with the frog above 

 each one. The activity is hormone controlled. 



