PRJDB2610 Metagenomic analyses of the viral communities in (hado)pelagic sediments We performed viral metagenomic analyses for the seafloor surface sediments in three distinct (hado)pelagic environments from the northwest Pacific; the Izu-Ogasawara Trench, the Challenger Deep in the Mariana Trench, and off Shimokita Peninsula of northeast Japan by 454 pyrosequencing. Extremobiosphere Research Program