Fin rot is a common bacterial infection that affects the fins and tails of fish. It is characterized by frayed, discolored, or decaying edges of the fins, which can lead to further health issues if not treated. Poor water quality, stress, and injuries can contribute to the development of this condition. To prevent fin rot, it is essential to maintain a clean and stable environment for fish, including regular water changes and proper filtration. If a fish shows signs of fin rot, treatment options may include improving water conditions and using antibacterial medications specifically designed for aquatic life.