The Great Pacific Garbage Patch is “a giant soup, a gyre. It's a whirlpool of tiny fragments of plastic in the ocean at various depths … between California and Hawaii” according to this CBS 60 Minutes story.
The episode explored the effects of plastic in the ocean on marine life and how it breaks down into microplastics. A related 60 Minutes report about plastics pollution is titled “Cleaning up the plastic in the ocean”.
Source: The Great Pacific Garbage Patch Isn't What You Think, December 16, 2018