"John was very, very focused and into the moment," says Marchesi, 39, of his counterpart, John Clark. "He was pretty intense, and I can get pretty intense too, so it was fun." If there's one thing the Bozeman, Montana–based Marchesi knows, it's focus. While diving in Micronesia on a personal project, he became so intent on photographing the barracuda that he ran out of air at 70 feet. Fortunately, he got the attention of a nearby dive master just in time. Marchesi agreed to head underwater again for Outside, to shoot Humboldt squid for a July 2006 story. "I didn't know if I was going to come back in one piece," he says.
On Marchesi: Heritage Military Shirt ($79) by Banana Republic; Trouleg 8HL jeans ($220) by Diesel.