The deep sea is a significant sink for microplastic debris, according to a study by Woodall et al. (2014). Despite the durability of plastic and its exponential production, monitoring data show limited evidence of increasing concentrations in marine habitats. The study found that microplastics, primarily in the form of fibers, were up to four orders of magnitude more abundant in deep-sea sediments from the Atlantic Ocean, Mediterranean Sea, and Indian Ocean compared to contaminated surface waters. This suggests a large, previously unknown repository of microplastics in the deep sea. The dominance of microfibers indicates an underreported and unsampled plastic fraction. Given the vastness of the deep sea and the prevalence of microplastics at all sites investigated, the deep-sea floor appears to be a major sink for microplastic debris, addressing the question of where all the missing plastic is located. The study highlights the need for further research to understand the impact of microplastics on deep-sea communities and ecosystem services.The deep sea is a significant sink for microplastic debris, according to a study by Woodall et al. (2014). Despite the durability of plastic and its exponential production, monitoring data show limited evidence of increasing concentrations in marine habitats. The study found that microplastics, primarily in the form of fibers, were up to four orders of magnitude more abundant in deep-sea sediments from the Atlantic Ocean, Mediterranean Sea, and Indian Ocean compared to contaminated surface waters. This suggests a large, previously unknown repository of microplastics in the deep sea. The dominance of microfibers indicates an underreported and unsampled plastic fraction. Given the vastness of the deep sea and the prevalence of microplastics at all sites investigated, the deep-sea floor appears to be a major sink for microplastic debris, addressing the question of where all the missing plastic is located. The study highlights the need for further research to understand the impact of microplastics on deep-sea communities and ecosystem services.