Marine debris, typically plastic, can be intercepted from areas where mismanaged waste poses a threat, whether on it's way to the ocean, or plucked straight out of the ocean. Ghost nets are fishing nets that have been lost or abandoned in the ocean and they name is suited, they're scary AF. Marine life of all shapes and sizes get entangled in them, often with lethal results. Since most modern nets are made of nylon or other plastic compounds, they contribute to the ocean plastic issue too.