patrick walsh and paul campo have a couple dozen years' experience swimming with sharks. >> definitelye junkie and really enjoy the outdoors. scuba diving is a new passion for me. always wanted to be in the water. >> i've been diving for about 28 years. as soon as i break the surface of that water, all those problems that are going on in everyday life just disappear and i'm just alone with myself and the creatures in the ocean. >> always seeking new adventure, the two head south, where the big boys play. >> this site is off the island of guadalupe. it's about?-- i think about 160 miles off the coast of baja, california. >> i had a little bit of apprehension on the way out about being that close to the top predator in the ocean. >> it takes them a full 24 hours to reach their destination, but the payoff is spectacular. >> because you've got really warm water and tons of sharks. yeah, on the first day we definitely had an exciting moment. we had a shark actually?-- a big female come in and she grabbed hold of one of the baits. >> and right at the bottom where i was filming out of the bot