Marine microbiology is a field of study that focuses on microorganisms that live in marine environments. These microorganisms play a vital role in various ecosystem processes, such as nutrient cycling, carbon sequestration, and energy transfer. Marine microbiologists study a wide range of organisms, including bacteria, viruses, archaea, and protists, and their interactions with each other and their environment. Research in marine microbiology has important implications for understanding the health and resilience of marine ecosystems, as well as for applications in biotechnology, environmental protection, and human health.