After doing some research I think its an Atlantic Spadefish
Other Names : Spade, Angelfish, Striped Angelfish, Atlantic Spadefish
Range & Habitat : Gulfwide, in nearshore and offshore waters. They are usually found in schools near deep pilings, wrecks and reefs. They are especially common at offshore oil and gas platforms in the northern Gulf.
Identification & Biology : The body is deeper than it is long. Color is silvery-gray with 3-6 vertical black bands. Juveniles are totally black in color. The dorsal and anal fins each have a long extension and the mouth is very small.
Atlantic spadefish are a schooling species. At least part of the attraction they have for obstructions has to do with their diet, which is heavy in encrusting animals and plants. They are known to eat sponges, polychaete worms, soft corals, tunicates, algae, sea cucumbers, feather stars, sea anemones, amphipods, and crustacean larvae. Spawning takes place during the summer in open waters.
Size : Averages 2-5 pounds, but can reach nearly 20 pounds.
Food Value : Acceptable; the flesh has a fairly dark, gray color and a taste of its own