Wow, I supposed I should consider myself lucky then - he was so close to us! Now I understand the look of utter fear on the snorkeling guide's face...
However, if it makes anyone feel better - we were on what they call a Jungle Tour in Cancun - you get to drive on a speedboat out to the middle of nowhere (out to a coral reef) and thats where we had our run in. So if you are just off shore you should be just fine. But going out to where we were was gorgeous - I am sure you will safe there too.
Thomas - give your wall ornament a little pat on the head for me