Fish families are groups of fish that share common characteristics, such as physical traits and genetic similarities. Each family contains various species that often inhabit similar environments, like freshwater or saltwater. Examples of fish families include Cichlidae, known for their vibrant colors and diverse behaviors, and Salmonidae, which includes popular fish like salmon and trout. Fish families are classified within a broader system called taxonomy, which organizes living organisms into hierarchical categories. This system helps scientists understand the relationships between different fish species and their evolutionary history. Families are further divided into genera and species, providing a detailed framework for studying aquatic life.