The life expectancy of the golden topminnow is around 2 years. The blackspotted topminnow eats various arthropods and algae. The historical distribution of plains topminnow includes two main populations. The Gila topminnow has an elongated curved body. The golden topminnow is able to tolerate a range of salinity levels. The blackspotted topminnow has an elongate body up to 9.7 centimeters long. The plains topminnow ("Fundulus sciadicus") is a species of freshwater topminnow found in North America. The diet of the topminnow consists of bottom debris, vegetation, and small crustaceans. Thus, plains topminnow spawning times usually depend on the latitude of individual populations. It belongs to the genus "Fundulus" in the killifish and topminnow family, Fundulidae. Gila topminnow are endangered due to predation and competition from the introduced mosquitofish. The plains topminnow spawns in the same vegetated areas that it lives in. The plains topminnow has 33 to 37 ctenoid scales in its lateral line. Gila topminnow was once the most common fish found in the Gila River drainage.