I have what I believe is a female festae, about 4-5 inches now. Whenever I watch the tank from around the corner and the fish can't see me she shows some dark vertical striping and it looks good. But when I come up closer to the tank and she notices me she changes her color and the black bars mostly disappear. But she is not shy at all. I was wondering if it is normal to hide the coloring for her whole life or is it because she is not an adult yet that she hides her coloring?