Killifishes are a unique and diverse group of small freshwater fish that come in many different colors and patterns. They are highly sought after by aquarium enthusiasts due to their stunning appearance and interesting behavior. There are a few different synonyms for the word "killifishes," including "Cyprinodonts," "Rivulines," and "Epiplatys." Cyprinodonts is a term used to describe the family of fish that killifishes belong to, while Rivulines refers specifically to a subfamily of killifishes that are found in South America. Epiplatys is the genus name for a group of African killifish species that are commonly kept in aquariums. Whatever the name, these unique fish species are sure to add a vibrant and fascinating touch to any aquarium.