Leonardo DiCaprio might want to stick to getting involved with conservation issues on land. 

The 39-year-old "Wolf of Wall Street" actor, who in 2010 nearly drowned off the Galapagos Islands, told Ellen DeGeneres that he once nearly became lunch for a great white shark.

"When I work with these non-profit organizations, you go on the ground, you see what's happening," he told Ellen, describing a trip to Nepal to look for tigers while riding an elephant. "And then I went scuba diving looking for sharks. And I had a huge fear of sharks. And when I did "Blood Diamond" in 2006, I actually got stuck in a cage with a great white - which was awesome."

DiCaprio continued: "They actually said (that) in 30 years, this has never happened. But the tuna kind of got stuck on the top of the cage, and the great white kind of leapt out and tried to bite it, and it went into the cage with me and half its body was in and out, and I flattened down at the bottom and it chomped a few times. It was absolutely terrifying." 

Check out video of Leo talking about the encounter with Ellen below. 

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