Man-made fibers and plastics are found in the deepest living organisms through processes like bioaccumulation and ingestion. Microplastics, including synthetic fibers, enter the oceans, where marine organisms ingest or absorb them. These particles can accumulate through the food chain, reaching even the deepest-living organisms in the ocean’s trenches. The presence of man-made materials in deep-sea life highlights the widespread and enduring impact of plastic pollution on marine ecosystems.