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.
... The population density is 380.6/km² (967.1/mi²). There are 595 housing units at an average density of 1,640.9/km² (4,169.6/mi²). The racial makeup ...