I was snorkeling in Grand Turk this past week, and I came across what looked like a small (not juvenile) yellowtail snapper. However, unlike the yellowtail, it had no yellow body markings. It did have a deeply forked yellow tail, as well as yellow dorsal and anal fins. It was swimming above turtle grass in about 5 feet of water, and the water was 84 degrees. Of course, I decided not to take my camera, so I don't have a photo.
Any help identifying this fish would be most appreciated.