The Family Cyprinodontidae, also known as the killifish or pupfish family, includes over 1,300 species of small freshwater and brackish water fish. Synonyms for this family include the Rivulidae, Profundulidae, Goodeidae, Fundulidae, Orestiidae, Valenciidae, and Cynolebiidae. These fish are found in various habitats worldwide, from the Americas to Africa and Asia. Killifish are known for their colorful displays, unique breeding habits, and ability to survive in extreme environments. Some species are even popular in aquariums due to their striking colors and small size. Overall, the Family Cyprinodontidae showcases a diverse array of fish with numerous synonyms that reflect their unique qualities and wide distribution.