Shark Attack Survivor Reveals Potentially Life-Saving Advice

Conservationist Paul de Gelder discusses losing two limbs in an encounter with a bull shark back in 2009.
5:06 | 07/06/15

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Transcript for Shark Attack Survivor Reveals Potentially Life-Saving Advice
Next up, the spate of shark attacks this summer. Look at this. On July 4th, an Australian news copter saw this shark. They tried to warn surfers. The discovery channel took T.J. Holmes out for his own close encounter. Reporter: I'm a man admittedly terrified of sharks. The string of recent incidents had me wanting to get into the water to swim with the sharks and better understand them. I came out of the water now as a shark P.R. Agent. They're not the man-eerts they're often made out to be. June 14th, 16-year-old hunter treschel never saw it coming. Somebody's been attacked by a shark. His arm is gone. Reporter: June 26th, Patrick Thornton bitten in waist-deep water. I felt a tug at my hip. Reporter: June 30th, kysen Weakley left with this bite on his leg. 11 shark encounters off the Carolinas. I haven't been in the water for three years. I was on vacation in Florida, a shark swam about 15, 20 feet away from me. It took all I had not to run out of the water screaming. Now, I'm getting back in the water to get up close with sharks. To underthe dangstand the dangers they do and don't pose to people. With me, Paul Geller, he lost two limbs to a shark take. I don't think they go for a human. They're just -- they're hungry. The thing is behaving similar to their food source. They want to see what it is. How do we see what stuff is? We touch it with our hands. Sharks don't have hands. They have very sensitive jaws. Reporter: Sensitive and powerful. The jaws of larger species are twice as powerful as the jaws of a lion. Generating 40,000 pounds of psh per square inch in a single bite. They feel vibrations in the water and hear from a distance of up to two city blocks. Should we fear sharks? No, have a healthy respect for them. They have their place. We have ours. Just because some people get bitten by sharks doesn't mean that they're out to get us. Reporter: We head down. And within seconds, are swarmed by sharks. My first impressions. Oh, oh . . This is insane. This is insane. Oh, my god. This is insane. To be this close to a shark, to be touching a shark. Oh. Wow. I just kissed a shark. I cannot believe I'm doing this. But I'm glad I did it. I never would have known. I might be finally over my fear of sharks. I got to say, man, you were right. You said this was going to be a life-changing experience. You were right. Does it make you understand a little bit more about what we're trying to protect? Makes you appreciate it? Make you love it? Reporter: Paul this is going to sound crazy, but I kind of don't want to go. Well, things have changed. Reporter: All right. I have to thanks Paul there, the good folks at discovery channel, and my dive coach, Charlotte, for taking care of me. I haven't been in the water in three years. As we talk about how fearful we are of sharks, they should fear us. 100 million sharks killed annually for shark fins. They end up on our plates. At that rate, they can't replenish themselves. We have to learn to do here, folks is co-exist. There are only three people killed worldwide. Given how many people are in the water, three killed worldwide in a shark encounter last year. One in the U.S. This year. None last year. We're going into their home day in and day outnnounced and behaving like food. You want to go back? I do now. I initially said, what aim doing? You see the first shark do by, you assume it's coming after you. We're so much more of a danger to them than they are to us. A lot of people go back to "Jaws." Shark week airs through Sunday on discovery. Let's go out to ginger. Last year, I learned the same thing.

This transcript has been automatically generated and may not be 100% accurate.

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