Flavobacterium is a genus of bacteria that are primarily found in aquatic environments, including freshwater and marine ecosystems. These bacteria are known for their yellow pigmentation, which is due to the presence of carotenoid pigments. They play a crucial role in the decomposition of organic matter, contributing to nutrient cycling in their habitats. Some species of Flavobacterium are also associated with fish and can cause diseases, impacting aquaculture and wild fish populations. They are gram-negative and can be identified through various biochemical tests. Research on Flavobacterium helps in understanding microbial ecology and developing strategies for managing fish health.