Species: G. loreto
The fish can be a light purple to a deep violet starting at the head which fades mid-body to a golden yellow at the tail. The Royal Gramma will also have a small black spot on the front of the dorsal fin and a black line that streaks through the eye. It resembles the false gramma (Pictichromis paccagnellae), with the two main differences between the two being the false gramma has clear fins and does not fade, but rather has a distinct change in color. The royal gramma is relatively small, averaging slightly over 8 cm (3 inches) and has been tank bred. The largest royal gramma was measured at 8 cm (3.1 in).