The family Poeciliidae consists of small freshwater fish commonly known as livebearers. This family includes popular aquarium species such as the guppy and molly. They are characterized by their ability to give birth to live young instead of laying eggs, which is a unique reproductive strategy among fish. Poeciliidae are found in various habitats, primarily in warm, shallow waters of North and Central America, as well as parts of Africa and Asia. They are known for their adaptability to different environments and can thrive in both freshwater and brackish waters. Their diverse colors and patterns make them popular among fish enthusiasts.