Argentine researchers have completed the first detailed analysis of marine macro-waste in the Mar del Plata submarine canyon, using an underwater robot known as a remotely operated vehicle (ROV) to explore depths between 878 and 3,820 meters during 17 dives between July and August 2025. During these dives, they cataloged a total of 29 waste items found between 1,120 and 3,820 meters. Of these, 27 were made of plastic, including bags, packaging, and fishing gear, while two were made of rubber. Researchers observed deep-sea marine life colonizing these items, such as an octocoral growing on a plastic sheet at 2,108 meters and a starfish clinging to a plastic bag at 3,243 meters. The study involved collecting 240 hours of video footage, offering new insights into a previously unexplored part of the seafloor. Out of the 17 dives, 10 found waste, showing that pollution in this area is not an isolated or rare occurrence. Scientists noted that underwater canyons often serve as pathways and gathering points for human-made materials. This study is especially significant because there has been little data on the southwest Atlantic region regarding deep-sea waste. Among the waste items discovered were a snack wrapper at 3,231 meters, a tissue packaging at 3,814 meters, and a plastic bag filled with sediment at 3,739 meters. These items have become part of the deep marine ecosystem, with various forms of marine life coexisting with them despite the presence of human waste. The findings are similar to those from other regions, such as the Mediterranean submarine canyons studied in 2018 and the Whittard canyon research published in 2025, which also highlighted how underwater currents can transport microplastics to depths greater than 3,000 meters. A researcher from the Bernardino Rivadavia Argentine Museum of Natural Sciences highlighted the importance of underwater canyons, which are known for their rich biodiversity, in understanding deep-sea ecosystems. The study raises concerns about the true extent of plastic pollution and underscores that no part of the ocean is free from human influence.