It is my strange little cameleon Hippo. It was nearly all black two months ago. It was solid black with two small very dark blue spots. In certain light you could actually see two colors of black. I tend to believe the color variances are from too much meat and not enough algea in its diet so I cut back feeding in hopes the tangs would graze more. I may start feeding daily again to test my theory now that I think of it.
Here is a better, but blurry pic of the masked marauder. Two months ago its whole under belly was black, and the blue was much darker.