Microplastics can really be found everywhere, even in the stomachs of creatures living deep underwater.
Marine scientists from the National University of Ireland (NUI) in Galway found the plastic bits in 73 percent of 233 deep-sea fish collected from the Northwest Atlantic Ocean—one of the highest microplastic frequencies in fish ever recorded worldwide.
https://www.ecowatch.com/plastics-deep-sea-fish-2536726086.html