Another study was conducted by collecting deep-sea sediment and coral specimens between 2011 and 2012 in the Mediterranean Sea, Southwest Indian Ocean, and Northeast Atlantic Ocean. Of the 12 coral and sediment samples taken, all were found with an abundance of microplastics. Rayon is not a plastic but was included in the study due to being a common synthetic material. It was found in all samples and comprised 56.9% of materials found, followed by polyester (53.4%), plastics (34.1%) and acrylic (12.4%). This study found that the amount of microplastics, in the form of microfibres, was comparable to that found in intertidal or subtidal sediments. A 2017 study had a similar finding – by surveying the Rockall Trough in the Northeast Atlantic Ocean at a depth of more than 2200 meters, microplastic fibers were identified at a concentration of 70.8 particles per cubic meter. This is comparable to amounts reported in surface waters. This study also looked at micropollution ingested by benthic invertebrates "Ophiomusium lymani", "Hymenaster pellucidus" and "Colus jeffreysianus" and found that of the 66 organisms studied, 48% had ingested microplastics in quantities also comparable to coastal species. A recent review of 112 studies found the highest plastic ingestion in organisms collected in the Mediterranean and Northeast Indian Ocean with significant differences among plastic types ingested by different groups of animals, including differences in colour and the type of prevalent polymers. Overall, clear fibre microplastics are likely the most predominant types ingested by marine megafauna around the globe.