I have a tiger oscar that in every way seems to be healthy happy and has a great appetite. The weird thing is that he only changes in color on the back half of his body. Equally on both ides. I have not had an oscar continually only be able to darken/lighten 1/2 of it's body. I had a picture of him (can't find now) and even the young man who I go to with my ?'s has not seen one do this with such color definition. I am not overly concerned just curious.
