It's really up to you.
Likewise, if you juggle sharp knives or whirring chainsaws, you stand a much better chance of needing many more Band-Aids than someone who is reading, and needs fear only the occasional paper cut.
I'll bet you a dollar there were lots of pictures of coral reefs and sunken ships and passing angelfish all over the waiting room of his chiropractic office back home in Longview. Going underwater and taking pictures of what you see - that's a cool hobby.
Last Sunday, Dr Petty added "swimming with sharks" off the Bahamas to the hobby, and after a 64-hour search over 4600 miles, the Coast Guard suspended their search for his remains. His diving vest and some other gear, shredded by you-know-what, were recovered.
I don't mean to make light of the man's passing, but this was totally preventable. Some of us seem to get an adrenalin rush from cheating the hangman, running with the bulls in Pamplona, jumping into the lion's den at the zoo, taunting the sharks where they live.
Dude. It's their ocean. Jump in, and they might feel threatened, and bite your head off. It's the underwater version of Stand Your Ground, and that's the only place it makes much sense.