Killifish fare widespread throughout Africa, Asia, South America, North America, and parts of Europe. These fish almost every biotope in freshwater. More than 500 species are represented in this group. Several species also inhabit brackish water and a few actually live in pure salt water. Killifish are well-known for their adaptability and many species inhabit bodies of water that dry up during the dry season. Some species spend part of the year living under a layer of ice, while the Desert Pupfish (Cyprinodon species) has, on occasion, been found in water with a temperature of 116.6°F (47°C). This is remarkable considering that this temperature is well-above the lethal body temperature for nearly all vertebrates (McGinnis 179). Since Killifish come from a range of environments, adaptations have been made. Among the most famous is the 'phoenix-like' cycle of death and rebirth.
Killifish included in this work: