The study tested samples of crustaceans found in the ultra-deep trenches that span the entire Pacific Ocean – the Mariana, Japan, Izu-Bonin, Peru-Chile, New Hebrides and Kermadec trenches.
These range from seven to more than 10 kilometres deep, including the deepest point in the ocean, Challenger Deep in the Mariana Trench.The team examined 90 individual animals and found ingestion of plastic ranged from 50% in the New Hebrides Trench to 100%
at the bottom of the Mariana Trench. The fragments identified include semi-synthetic cellulosic fibres, such as Rayon, Lyocell and Ramie, which are all microfibres used in products such as textiles, to plastic fibres that are likely to come from plastic bottles, fishing equipment or everyday packaging