Permit with yellow

Diving off Isla Mujeres, September 2011. Saw multiple Permit fish with yellow on trailing edge of dorsal and anal fin. "Reef Fish" only describes yellow on anal fin. Has anyone else seen this variant?   Fish also had the dark black midbody patch of skin described in book, but dorsal leading edge was full black from body to tip of fin. Time to invest in a camera.

Design by Joanne Kidd, development by Ben Weintraub