Today, there are hundreds of careers in diving. A recreational dive leader instructs and supervises recreational divers. Acquiring the appropriate formal education for a career under water is usually the first step.

No wreck is too challenging, no water too murky, no dive too tough for Uncle Sam's elite band of diving rangers.

What's it like to be a golf ball diver? What drives poachers and pros to risk polluted water, snake bites, gator attacks and accidental drowning? As much as $100,000 a year.