I snorkeled a bit in front of Banana Beach and there was nothing to see. Really, go ahead and invest in the trips to Shark Ray Alley, Hol Chan Reserve, Mexico Rocks, etc. For the price, they are SOOOO worth it. You will be enchanted (and probably hooked for return trips to AC). I recommend Alfonso Graniel as a guide. His trip was so much fun, I did it twice in the same week !!