Since the reports three decades ago revealed that viruses are surprisingly abundant and efficiently infective in the ocean, marine viruses have generated a great attention and excitement [1].With estimate of 1.5 × 1030 particles, viruses are the most abundant biological entities in the ocean and are considered as the key components in the marine environment [1,2].Globally, marine viruses have been estimated to infect approximately 1023 microbes every second, removing 20％-40％ of the standing stock of marine microbes each day [2].Given that viruses are major agents of microbial mortality and consist of a huge reservoir of the greatest genetic diversity, marine viruses are regarded as nanoscale drivers of microbial dynamics, evolution, diversity, and nutrient cycling throughout the global ocean [2-4].Continuous investigations into the vast marine viral community have help to explore the unique viral roles in impacting host microbes and biogeochemical processes in the ocean.