The family Cyprinodontidae, commonly known as killifish, includes small, freshwater and brackish water fish. They are characterized by their elongated bodies and vibrant colors, making them popular in aquariums. This family consists of over 300 species, which are found in various habitats, including ponds, swamps, and streams. Killifish are known for their unique reproductive strategies, with some species laying eggs that can survive in dry conditions. This adaptation allows them to thrive in temporary water bodies. They play an important role in their ecosystems, serving as both prey and predator within their food webs.