The Great Pacific Garbage Patch isn't what you think

The world's largest collection of ocean debris is also the most famous, but its name, the "Great Pacific Garbage Patch," is a misnomer.

For starters, it's not one giant patch.

"It's not a mass. It's nothing you can see from space, all these things one's heard," 60 Minutes producer Michael Gavshon said in the video above. "But in fact it's just a giant soup, a gyre. It's a whirlpool of tiny fragments of plastic in the ocean at various depths."

Along with 60 Minutes associate producer David Levine, Gavshon produced a report this week on the plague of plastic in the ocean. While on Midway Atoll, they spoke with the National Oceanographic and Atmospheric Administration's Kevin O'Brien, who oversees marine debris removal in the part of the Pacific between California and Hawaii. O'Brien said that when he sailed through the Garbage Patch, he noticed an uptick in the amount of plastic he was seeing all around him, but it wasn't quite an island of trash.

"I saw lots of things floating in the water — a large derelict fishing net, a ghost net, or I might see a bottle or a crate" he said. "Even if the debris isn't so intense that it's a floating mat of trash, even if it's more disperse than that, it could still hold an enormous amount of plastic."

O'Brien said plastics floating in the ocean are exposed to several environmental factors — including waves, reefs and rocks — that cause them to break down into smaller fragments, which are difficult to clean.

"The plastics spread out," Levine said. "It's under the surface. It's not an easy thing to mop up. If it were a garbage island, I think it probably would be much easier to clean up."

To watch the 60 Minutes two-part report about plastics pollution, click here.

The video above was produced by Will Croxton and Brit McCandless Farmer. It was edited by Will Croxton. Ann Silvio was the interviewer.

Underwater footage courtesy of NatureFootage and Getty Images