Parodon is a genus of small scraper characins native to river and stream systems across South America, with the atlas's 14 species recorded from Colombia, Brazil, Argentina, Ecuador, Paraguay, Venezuela, Bolivia, and French Guiana. At roughly 4–6 in, Parodon species have a slender, torpedo-shaped body and a distinctive downturned, ventral mouth lined with fine teeth, an adaptation for scraping algae and periphyton off rocks and submerged wood in the fast, well-oxygenated currents they favor — a lifestyle reflected in common names like Parodon nasus, the foxnose characin, and Parodon pongoensis, the Peru scraper tetra.
Parodon is mostly of scientific and ecological interest rather than a hobby staple; it rarely appears in the aquarium trade, and detailed husbandry notes for most of the 14 atlas species are sparse. Where the genus is discussed, it is usually in the context of its ecological role as an algae grazer in swift Andean and Amazonian foothill streams, alongside other scraper-mouthed characins. The conservation picture is mixed and not especially reassuring: alongside seven Least Concern species, the genus carries one Endangered and two Vulnerable species plus a Data Deficient species, against several still Not Evaluated, pointing to real pressure on at least part of the genus's range.