A new study by a UC San Diego Assistant Professor says there is more plastic pollution in the deepest parts of the ocean than previously thought. Assistant Professor Anela Choy spent the last three years studying water samples off the Monterey Bay coast and found the highest concentration of micro-plastics at levels 200-600 meters below the surface. “It’s a great problem,” Choy says. “Tt’s pervasive and we’re just starting to understand the sources.” Choy worked with the Monterey Bay Aquarium Research Institute to test water samples at varying depths. They also took readings of micro-plastics in the digestive systems of animals at different depths.