Main Page | See live article | Alphabetical index The Cyprinodontiformes is an order of ray-finned fish, also called the Microcyprini, and comprising mostly small, fresh-water fish. They are closely related to the Atheriniformes and are occasionally included with them. Many popular aquarium fish, such as killifish and live-bearers, belong here. Family Anablepidae (four-eyed fish) Family Cyprinodontidae (pupfish) Family Fundulidae Family Goodeidae Family Rivulinidae Family Poeciliidae (live-bearers) et al. Death Valley pupfish This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.