Curimatella belongs to Curimatidae, the toothless characins — a large South American family of deep-bodied, laterally compressed, silvery fish that have lost or drastically reduced their teeth and instead feed by grazing algae, detritus, and organic sediment off submerged surfaces. Species in the atlas range from about 6–7.5 in and are found widely across major river systems, from Brazil and Colombia down to Argentina and Bolivia. Like other curimatids, Curimatella typically schools in open water along river channels and floodplain lakes rather than hiding in cover, and its small, protrusible mouth is built for picking food from surfaces rather than capturing prey.
Curimatella is a fish of the river more than the aquarium — species such as Curimatella alburnus, known locally as "llambina," and C. lepidura, known as "manjuba," are recognized in parts of South America as small food and bait fish rather than ornamental stock, and they rarely if ever appear in the hobby trade. Their ecological role as grazers that keep algal and detrital growth in check is arguably their biggest significance, both in the wild and as a signal species in river-health studies. None of the five species in the atlas is currently ranked above Least Concern, and two have not yet been formally assessed.