Researchers from China's First Institute of Oceanography identified nearly 1,700 previously unrecorded viruses after sequencing deep-water samples from the Dragon Hole in the South China Sea. Analyses show most infect bacteria and other microbes, remain confined to deep, low‑oxygen layers, and show no evidence of human infection.

Discovery of 1,700 deep sea viruses expands understanding of marine microbial drivers and will likely reshape medium term models of nutrient cycling, carbon flows and fisheries productivity. Researchers and sector stakeholders can expect revised biogeochemical models and targeted studies over the next few years that will inform ecosystem management and seafood resource assessments.